38 key strategic activities during the period ended december 31 , 2013 included : international update  international geo-targeted revenue increased by 23 % in the year ended december 31 , 2013 as compared to the same period a year ago . we believe that our integrated product offering across regions continues to resonate with international marketers and is contributing to our successful results . we plan on continuing to invest in these capabilities as we seek opportunities to increase our global reach . during 2013 , we launched direct operations in germany after a long-term partnership expired . site launches and updates : in the twelve month period ended december 31 , 2013 , we launched and updated the following websites : searchsdn.com , a new website designed to help network professionals make informed decisions as they transition to software-defined networking . software-defined networking ( sdn ) is a disruptive technology that promises to revolutionize networking . searchsdn.com is dedicated to covering all aspects of software-defined networking to provide more focused coverage of evolving sdn technology and business issues . it provides news and technical content on software-defined networking deployment , building service provider/cloud networks based on sdn , as well as sdn implementation and management in data centers , remote branches and in local area networks ( lans ) . technologyguide.com , a website that focuses on growing trends including consumerization and bring your own device ( byod ) . test centers in cincinnati and boston enable technologyguide 's experienced editorial staff to carefully evaluate and compare products in a controlled environment . this makes it a must-read resource for technology-savvy enthusiasts , it professionals , and other buyers searching for trusted purchase information . searchdatacenter.de , searchnetworking.de , searchsecurity.de , searchstorage.de and search enterprisesoftware.de , which are websites that contain , in the german language , assets similar to those in our .com website of a similar domain name , as well as de.bitpipe.com , an extensive german-language white paper , webcast and video it library with more than 200 german language assets . we upgraded our lemagit.fr site , resulting in an expanded product capability set for the french enterprise it market . searchdatacenter en español delivers targeted content focused on critical issues and solutions for latin american it buyers across key enterprise it segments , including : business applications and business intelligence ; data center hardware and storage ; networking ; enterprise security ; as well as cross-it trends such as cloud computing , mobility , and big data . it launched with more than 500 original spanish-language articles , numerous spanish-language e-books , and a resource library for spanish-language white papers and webcasts . bitpipe.com.br is a new portuguese-language technology content library that will serve the needs of brazilian it buyers seeking white papers , webcasts and videos to support technology purchase decisions and provide technology companies the opportunity to generate active enterprise technology leads in this fast-growing market . the library has many highly targeted topic sections , including : business applications , business intelligence , data center hardware , storage , networking , enterprise security , cloud computing , mobility , big data , and more . it deal alert  our it deal alert qualified opportunities service , which we introduced at the end of the second quarter of 2013 , is gaining traction with our customers . in the fourth quarter of 2013 we had more than 100 customers utilizing our it deal alert service ; this is up from 50 39 customers in the third quarter of 2013. we expect this adoption to accelerate in 2014 as we continue to receive very positive feedback from customers on the service and expect it deal alert to be a meaningful growth driver in 2014. sources of revenues we sell advertising programs to it vendors targeting a specific audience within a particular it sector or sub-sector . we maintain multiple points of contact with our customers to provide support throughout their organizations and the sales cycle . as a result , our customers often run multiple advertising programs with us in order to reach discrete portions of our targeted audience . there are multiple factors that can impact our customers ' advertising objectives and spending with us , including but not limited to , product launches , increases or decreases to their advertising budgets , the timing of key industry marketing events , responses to competitor activities and efforts to address specific marketing objectives such as creating brand awareness or generating sales leads . our services are generally delivered under short-term contracts that run for the length of a given advertising program , typically less than six months . the majority of our revenue is derived from the delivery of our online offerings from our media groups . online revenue represented 90 % , 88 % and 87 % of total revenues for the years ended december 31 , 2013 , 2012 and 2011 , respectively . we use both online and event offerings to provide it vendors with numerous touch points to reach key it decision makers and to provide it professionals with highly specialized content across multiple forms of media . we are experienced in assisting advertisers to develop custom advertising programs that maximize branding and roi . the following is a description of the services we offer : online . our network of websites forms the core of our content platform . our websites provide it professionals with comprehensive decision support information tailored to their specific areas of responsibility and purchasing decisions . through our websites , we offer a variety of online media offerings to connect it vendors to it professionals . our lead generation offerings allow it vendors to maximize roi by capturing qualified sales leads from the distribution and promotion of content to our audience of it professionals . in august of 2011 , we released a major upgrade to our activity intelligence platform . story_separator_special_tag if the fair value of the reporting unit exceeds its carrying amount , the reporting unit 's goodwill is not considered to be impaired and the second step of the impairment test is not performed . whenever indicators of impairment are present , we would perform the second step and compare the implied fair value of the reporting unit 's goodwill , as defined by asc 350 , to its carrying value to determine the amount of the impairment loss , if any . as of december 31 , 2013 , there are no indications of impairment based on our step one analysis , and our estimated fair value exceeded our carrying value by a significant margin . 44 fair value of financial instruments financial instruments consist of cash and cash equivalents , short-term and long-term investments , accounts receivable , accounts payable and contingent consideration . due to their short-term nature and liquidity , the carrying value of these instruments with the exception of contingent consideration approximates their estimated fair values . the fair value of contingent consideration was estimated using a discounted cash flow method . allowance for doubtful accounts we offset gross trade accounts receivable with an allowance for doubtful accounts . the allowance for doubtful accounts is our best estimate of the amount of probable credit losses in our existing accounts receivable . we review our allowance for doubtful accounts on a regular basis , and all past due balances are reviewed individually for collectability . account balances are charged against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote . provisions for doubtful accounts are recorded in general and administrative expense . if our historical collection experience does not reflect our future ability to collect outstanding accounts receivable , our future provision for doubtful accounts could be materially affected . to date , we have not incurred any write-offs of accounts receivable significantly different than the amounts reserved . the allowance for doubtful accounts was $ 0.9 million at both december 31 , 2013 and december 31 , 2012. stock-based compensation we measure stock-based compensation at the grant date based on the fair value of the award and recognize stock-based compensation in our results of operations using the straight-line method over the vesting period of the award or using the accelerated method if the award is contingent upon performance goals . we use the black-scholes option pricing model to determine the fair value of stock option awards . we calculated the fair values of the options granted using the following estimated weighted average assumptions : replace_table_token_8_th as there was no public market for our common stock prior to our initial public offering in may 2007 and , until recently , there has been limited historical information on the volatility of our common stock since the date of our initial public offering , we have historically determined the volatility for options granted based on an analysis of the historical volatility of our stock and reported data for a peer group of companies that issued options with substantially similar terms . the expected volatility of options granted in 2013 has been determined using a weighted average of the historical volatility of our stock for a period equal to the expected life of the option ; a combined historical volatility of our stock and the peer group of companies was used in prior years . the risk-free interest rate is based on a zero coupon united states treasury instrument whose term is consistent with the expected life of the stock options . we have not paid and do not anticipate paying cash dividends on our shares of common stock ; therefore , the expected dividend yield is assumed to be zero . we applied an estimated annual forfeiture rate based on our historical forfeiture experience of 4.44 % , 4.17 % and 3.6 % in determining the expense recorded in the years ended december 31 , 2013 , 2012 and 2011 , respectively . internal-use software and website development costs we capitalize costs of materials , consultants and compensation and related expenses of employees who devote time to the development of internal-use software and website applications and infrastructure involving 45 developing software to operate our websites . however , we expense as incurred website development costs for new features and functionalities since it is not probable that they will result in additional functionality until they are both developed and tested with confirmation that they are more effective than the current set of features and functionalities on our websites . our judgment is required in determining the point at which various projects enter the state at which costs may be capitalized , in assessing the ongoing value of the capitalized costs and in determining the estimated useful lives over which the costs are amortized , which is generally three years . to the extent that we change the manner in which we develop and test new features and functionalities related to our websites , assess the ongoing value of capitalized assets or determine the estimated useful lives over which the costs are amortized , the amount of website development costs we capitalize and amortize in future periods would be impacted . we review capitalized internal-use software and website development costs for recoverability whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable . we would recognize an impairment loss only if the carrying amount of the asset is not recoverable and exceeds its fair value . we capitalized internal-use software and website development costs of $ 3.6 million , $ 3.0 million and $ 3.2 million for the years ended december 31 , 2013 , 2012 and 2011 , respectively . income taxes we are subject to income taxes in both the united states and foreign jurisdictions , and we use estimates in determining our provision for income taxes . we recognize

liquidity and capital resources resources at december 31 , 2013 , we had $ 43.7 million of working capital , and our cash and cash equivalents totaled $ 15.4 million . our cash , cash equivalents and investments decreased $ 42.6 million during fiscal 2013 , primarily from cash used by our financing activities , for the purchase of treasury shares through our tender offer and stock repurchase program , as further described below ; and investing activities , for purchases of property and equipment , offset in part by cash provided by our operating activities . we believe that our existing cash , cash equivalents , and investments , our cash flow from operating activities and available bank borrowings will be sufficient to meet our anticipated cash needs for at least the next 12 months . our future working capital requirements will depend on many factors , including the operations of our existing business , our potential strategic expansion internationally , future acquisitions we might undertake , and the expansion into complementary businesses . to the extent that our cash and cash equivalents , investments and cash flow from operating activities are insufficient to fund our future activities , we may need to raise additional funds through bank credit arrangements or public or private equity or debt financings . we also may need to raise additional funds in the event we determine in the future to effect one or more additional acquisitions of businesses . replace_table_token_17_th cash , cash equivalents and investments our cash , cash equivalents and investments at december 31 , 2013 were held for working capital purposes and were invested primarily in money market accounts , municipal bonds and government agency bonds . we do not enter into investments for trading or speculative purposes . accounts receivable , net our accounts receivable balance fluctuates from period to period , which affects our cash flow from operating activities . the fluctuations vary depending on the timing of our service delivery and billing activity , cash collections , and changes to our allowance for doubtful accounts .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```liquidity and capital resources resources at december 31 , 2013 , we had $ 43.7 million of working capital , and our cash and cash equivalents totaled $ 15.4 million . our cash , cash equivalents and investments decreased $ 42.6 million during fiscal 2013 , primarily from cash used by our financing activities , for the purchase of treasury shares through our tender offer and stock repurchase program , as further described below ; and investing activities , for purchases of property and equipment , offset in part by cash provided by our operating activities . we believe that our existing cash , cash equivalents , and investments , our cash flow from operating activities and available bank borrowings will be sufficient to meet our anticipated cash needs for at least the next 12 months . our future working capital requirements will depend on many factors , including the operations of our existing business , our potential strategic expansion internationally , future acquisitions we might undertake , and the expansion into complementary businesses . to the extent that our cash and cash equivalents , investments and cash flow from operating activities are insufficient to fund our future activities , we may need to raise additional funds through bank credit arrangements or public or private equity or debt financings . we also may need to raise additional funds in the event we determine in the future to effect one or more additional acquisitions of businesses . replace_table_token_17_th cash , cash equivalents and investments our cash , cash equivalents and investments at december 31 , 2013 were held for working capital purposes and were invested primarily in money market accounts , municipal bonds and government agency bonds . we do not enter into investments for trading or speculative purposes . accounts receivable , net our accounts receivable balance fluctuates from period to period , which affects our cash flow from operating activities . the fluctuations vary depending on the timing of our service delivery and billing activity , cash collections , and changes to our allowance for doubtful accounts .
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 Suspicious Activity Report : 38 key strategic activities during the period ended december 31 , 2013 included : international update  international geo-targeted revenue increased by 23 % in the year ended december 31 , 2013 as compared to the same period a year ago . we believe that our integrated product offering across regions continues to resonate with international marketers and is contributing to our successful results . we plan on continuing to invest in these capabilities as we seek opportunities to increase our global reach . during 2013 , we launched direct operations in germany after a long-term partnership expired . site launches and updates : in the twelve month period ended december 31 , 2013 , we launched and updated the following websites : searchsdn.com , a new website designed to help network professionals make informed decisions as they transition to software-defined networking . software-defined networking ( sdn ) is a disruptive technology that promises to revolutionize networking . searchsdn.com is dedicated to covering all aspects of software-defined networking to provide more focused coverage of evolving sdn technology and business issues . it provides news and technical content on software-defined networking deployment , building service provider/cloud networks based on sdn , as well as sdn implementation and management in data centers , remote branches and in local area networks ( lans ) . technologyguide.com , a website that focuses on growing trends including consumerization and bring your own device ( byod ) . test centers in cincinnati and boston enable technologyguide 's experienced editorial staff to carefully evaluate and compare products in a controlled environment . this makes it a must-read resource for technology-savvy enthusiasts , it professionals , and other buyers searching for trusted purchase information . searchdatacenter.de , searchnetworking.de , searchsecurity.de , searchstorage.de and search enterprisesoftware.de , which are websites that contain , in the german language , assets similar to those in our .com website of a similar domain name , as well as de.bitpipe.com , an extensive german-language white paper , webcast and video it library with more than 200 german language assets . we upgraded our lemagit.fr site , resulting in an expanded product capability set for the french enterprise it market . searchdatacenter en español delivers targeted content focused on critical issues and solutions for latin american it buyers across key enterprise it segments , including : business applications and business intelligence ; data center hardware and storage ; networking ; enterprise security ; as well as cross-it trends such as cloud computing , mobility , and big data . it launched with more than 500 original spanish-language articles , numerous spanish-language e-books , and a resource library for spanish-language white papers and webcasts . bitpipe.com.br is a new portuguese-language technology content library that will serve the needs of brazilian it buyers seeking white papers , webcasts and videos to support technology purchase decisions and provide technology companies the opportunity to generate active enterprise technology leads in this fast-growing market . the library has many highly targeted topic sections , including : business applications , business intelligence , data center hardware , storage , networking , enterprise security , cloud computing , mobility , big data , and more . it deal alert  our it deal alert qualified opportunities service , which we introduced at the end of the second quarter of 2013 , is gaining traction with our customers . in the fourth quarter of 2013 we had more than 100 customers utilizing our it deal alert service ; this is up from 50 39 customers in the third quarter of 2013. we expect this adoption to accelerate in 2014 as we continue to receive very positive feedback from customers on the service and expect it deal alert to be a meaningful growth driver in 2014. sources of revenues we sell advertising programs to it vendors targeting a specific audience within a particular it sector or sub-sector . we maintain multiple points of contact with our customers to provide support throughout their organizations and the sales cycle . as a result , our customers often run multiple advertising programs with us in order to reach discrete portions of our targeted audience . there are multiple factors that can impact our customers ' advertising objectives and spending with us , including but not limited to , product launches , increases or decreases to their advertising budgets , the timing of key industry marketing events , responses to competitor activities and efforts to address specific marketing objectives such as creating brand awareness or generating sales leads . our services are generally delivered under short-term contracts that run for the length of a given advertising program , typically less than six months . the majority of our revenue is derived from the delivery of our online offerings from our media groups . online revenue represented 90 % , 88 % and 87 % of total revenues for the years ended december 31 , 2013 , 2012 and 2011 , respectively . we use both online and event offerings to provide it vendors with numerous touch points to reach key it decision makers and to provide it professionals with highly specialized content across multiple forms of media . we are experienced in assisting advertisers to develop custom advertising programs that maximize branding and roi . the following is a description of the services we offer : online . our network of websites forms the core of our content platform . our websites provide it professionals with comprehensive decision support information tailored to their specific areas of responsibility and purchasing decisions . through our websites , we offer a variety of online media offerings to connect it vendors to it professionals . our lead generation offerings allow it vendors to maximize roi by capturing qualified sales leads from the distribution and promotion of content to our audience of it professionals . in august of 2011 , we released a major upgrade to our activity intelligence platform . story_separator_special_tag if the fair value of the reporting unit exceeds its carrying amount , the reporting unit 's goodwill is not considered to be impaired and the second step of the impairment test is not performed . whenever indicators of impairment are present , we would perform the second step and compare the implied fair value of the reporting unit 's goodwill , as defined by asc 350 , to its carrying value to determine the amount of the impairment loss , if any . as of december 31 , 2013 , there are no indications of impairment based on our step one analysis , and our estimated fair value exceeded our carrying value by a significant margin . 44 fair value of financial instruments financial instruments consist of cash and cash equivalents , short-term and long-term investments , accounts receivable , accounts payable and contingent consideration . due to their short-term nature and liquidity , the carrying value of these instruments with the exception of contingent consideration approximates their estimated fair values . the fair value of contingent consideration was estimated using a discounted cash flow method . allowance for doubtful accounts we offset gross trade accounts receivable with an allowance for doubtful accounts . the allowance for doubtful accounts is our best estimate of the amount of probable credit losses in our existing accounts receivable . we review our allowance for doubtful accounts on a regular basis , and all past due balances are reviewed individually for collectability . account balances are charged against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote . provisions for doubtful accounts are recorded in general and administrative expense . if our historical collection experience does not reflect our future ability to collect outstanding accounts receivable , our future provision for doubtful accounts could be materially affected . to date , we have not incurred any write-offs of accounts receivable significantly different than the amounts reserved . the allowance for doubtful accounts was $ 0.9 million at both december 31 , 2013 and december 31 , 2012. stock-based compensation we measure stock-based compensation at the grant date based on the fair value of the award and recognize stock-based compensation in our results of operations using the straight-line method over the vesting period of the award or using the accelerated method if the award is contingent upon performance goals . we use the black-scholes option pricing model to determine the fair value of stock option awards . we calculated the fair values of the options granted using the following estimated weighted average assumptions : replace_table_token_8_th as there was no public market for our common stock prior to our initial public offering in may 2007 and , until recently , there has been limited historical information on the volatility of our common stock since the date of our initial public offering , we have historically determined the volatility for options granted based on an analysis of the historical volatility of our stock and reported data for a peer group of companies that issued options with substantially similar terms . the expected volatility of options granted in 2013 has been determined using a weighted average of the historical volatility of our stock for a period equal to the expected life of the option ; a combined historical volatility of our stock and the peer group of companies was used in prior years . the risk-free interest rate is based on a zero coupon united states treasury instrument whose term is consistent with the expected life of the stock options . we have not paid and do not anticipate paying cash dividends on our shares of common stock ; therefore , the expected dividend yield is assumed to be zero . we applied an estimated annual forfeiture rate based on our historical forfeiture experience of 4.44 % , 4.17 % and 3.6 % in determining the expense recorded in the years ended december 31 , 2013 , 2012 and 2011 , respectively . internal-use software and website development costs we capitalize costs of materials , consultants and compensation and related expenses of employees who devote time to the development of internal-use software and website applications and infrastructure involving 45 developing software to operate our websites . however , we expense as incurred website development costs for new features and functionalities since it is not probable that they will result in additional functionality until they are both developed and tested with confirmation that they are more effective than the current set of features and functionalities on our websites . our judgment is required in determining the point at which various projects enter the state at which costs may be capitalized , in assessing the ongoing value of the capitalized costs and in determining the estimated useful lives over which the costs are amortized , which is generally three years . to the extent that we change the manner in which we develop and test new features and functionalities related to our websites , assess the ongoing value of capitalized assets or determine the estimated useful lives over which the costs are amortized , the amount of website development costs we capitalize and amortize in future periods would be impacted . we review capitalized internal-use software and website development costs for recoverability whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable . we would recognize an impairment loss only if the carrying amount of the asset is not recoverable and exceeds its fair value . we capitalized internal-use software and website development costs of $ 3.6 million , $ 3.0 million and $ 3.2 million for the years ended december 31 , 2013 , 2012 and 2011 , respectively . income taxes we are subject to income taxes in both the united states and foreign jurisdictions , and we use estimates in determining our provision for income taxes . we recognize

