we currently offer the same solutions internationally as we do in the united states , and we intend to continue expanding our international operations . we do not take title to any of the merchandise processed through our platform and we generally do not collect payments on behalf of our customers . we do not hold any inventory of merchandise and we are not involved in the physical logistics of shipping merchandise to buyers , which is handled by our customers . we plan to grow our revenue by adding new customers , helping our existing customers increase their gmv processed through our platform by taking full advantage of its functionality and selling additional module subscriptions to existing customers to allow them to sell merchandise through new channels . we face a variety of challenges and risks , which we will need to address and manage as we pursue our growth strategy . in particular , we will need to continue to innovate in the face of a rapidly changing e-commerce landscape if we are to remain competitive , and we will need to effectively manage our growth , especially related to our international expansion . in addition , as consumer preferences potentially shift from smaller retailers , we need to continue to add large retailers and branded manufacturers as profitable customers . these customers generally pay a lower percentage of gmv as fees based on the high 33 volume of their gmv processed through the platform . we continue to focus our efforts on increasing value for our customers to support higher rates . although e-commerce continues to expand as retailers and manufacturers continue to increase their online sales , it is also becoming more complex and fragmented due to the hundreds of channels available to retailers and manufacturers and the rapid pace of change and innovation across those channels . in order to gain consumers ' attention in a more crowded and competitive online marketplace , many retailers and an increasing number of manufacturers sell their merchandise through multiple online channels , each with its own rules , requirements and specifications . in particular , third-party marketplaces are an increasingly important driver of growth for a number of large online retailers , and as a result we need to continue to support multiple channels in a variety of geographies in order to support our targeted revenue growth . as of december 31 , 2014 , we supported 41 marketplaces , up from 35 at december 31 , 2013 . we believe the growth in e-commerce globally presents an opportunity for retailers and manufacturers to engage in international sales . however , country-specific marketplaces are often the market share leaders in their regions , as is the case for alibaba in asia and mercadolibre in much of latin america . in order to help our customers capitalize on this potential market opportunity , and to address our customers ' needs with respect to cross-border trade , during 2013 and 2014 , we have expanded our presence in the asia-pacific and latin america regions through the opening of two offices in china , an office in brazil and an additional office in australia . doing business overseas involves substantial challenges , including management attention and resources needed to adapt to multiple languages , cultures , laws and commercial infrastructure , as further described in this report under the caption “ risks related to our international operations . ” our senior management continuously focuses on these and other trends and challenges , and we believe that our culture of innovation and our history of growth and expansion will contribute to the success of our business . we can not , however , assure you that we will be successful in addressing and managing the many challenges and risks that we face . key financial and operating performance metrics we regularly monitor a number of financial and operating metrics in order to measure our performance and project our future performance . these metrics aid us in developing and refining our growth strategies and making strategic decisions . we discuss revenue , gross margin and the components of net loss in the section below entitled “ — components of operating results . ” in addition , we utilize other key metrics as described below . core revenue our reported operating results include revenue attributable to the products from two small legacy acquisitions , both of which occurred prior to 2008 and focused on solutions for lower-volume ebay sellers . we do not consider these products to be a core part of our strategic focus going forward . each of these acquisitions contributed a relatively large number of customers with revenue per customer substantially lower than is characteristic of the rest of our business . we exclude the revenue attributable to these non-core , legacy products in calculating a measure we refer to as core revenue . we anticipate that the revenue associated with these non-core , legacy products will continue to decline over time both in absolute terms and as a percentage of our total revenue . number of core customers the number of customers subscribing to our solutions is a primary determinant of our core revenue . we refer to the customers who subscribe to any of our solutions , other than the non-core , legacy products described above , as our core customers . the number of core customers was 2,841 , 2,429 and 1,928 as of december 31 , 2014 , 2013 and 2012 , respectively . average revenue per core customer the average revenue generated by our core customers is the other primary determinant of our core revenue . story_separator_special_tag our revenue from international operations of $ 14.2 million , or 20.8 % of total revenue , for the year ended december 31 , 2013 increased from $ 11.4 million , or 21.4 % of total revenue , for the year ended december 31 , 2012. the increase in revenue from our international operations was primarily attributable to an increase in the number of international customers . during 2013 , we expanded our presence in the asia-pacific and latin america regions . core revenue replace_table_token_13_th 41 the growth in core revenue was primarily attributable to a 26.0 % increase in the number of core customers using our platform at december 31 , 2013 as compared to december 31 , 2012. the increase in core customers accounted for 62.3 % of the increase in core revenue during the year ended december 31 , 2013. in addition , we experienced a 9.3 % increase in the average revenue per core customer during the year ended december 31 , 2013 as compared to the year ended december 31 , 2012 , which accounted for 37.7 % of the increase in core revenue during the period . the increase in the average revenue per core customer was primarily attributable to an overall increase in transaction volume and , to a lesser extent , to modest overall increases in the percentage fees assessed on the fixed and variable portions of gmv under our contractual arrangements with some of our customers during the year . because we generally enter into annual contracts with our customers , we may renegotiate either or both of the fixed and variable components of the pricing structure of a customer 's contract each year . in addition , the increase in average revenue per core customer was due in part to a general shift in our customer base toward a greater proportion of larger enterprise customers , all of which are core customers . our enterprise customers generally commit to a higher specified minimum amount of gmv per month , which results in a higher proportion of fixed subscription fees . cost of revenue replace_table_token_14_th the increase in cost of revenue was primarily attributable to a $ 2.2 million increase in salaries and personnel-related costs , as we increased the number of employees providing services to our expanding customer base and supporting our platform infrastructure from 110 at december 31 , 2012 to 144 at december 31 , 2013. in addition , we experienced a $ 0.7 million increase in depreciation expense associated with equipment for our data centers and a $ 0.3 million increase in credit card vendor transaction fees . as a percentage of revenue , cost of revenue declined from 27.5 % for the year ended december 31 , 2012 to 26.6 % for the year ended december 31 , 2013. operating expenses sales and marketing replace_table_token_15_th the increase in sales and marketing expense was primarily attributable to a $ 9.6 million increase in salaries and personnel-related costs , as we increased the number of sales and marketing and customer support personnel to continue driving revenue growth . the number of full-time sales and marketing employees increased from 189 at december 31 , 2012 to 301 at december 31 , 2013. in addition , we experienced a $ 3.1 million increase in our marketing and advertising expenses , promotional event programs and travel costs . the increase in sales and marketing expense as a percentage of revenue for the year ended december 31 , 2013 reflects the implementation of our strategy of hiring new sales and marketing professionals and expanding our marketing activities in order to continue to grow our business . research and development replace_table_token_16_th the increase in research and development expense was primarily attributable to a $ 2.1 million increase in salaries and personnel-related costs associated with an increase in research and development personnel . the number of full-time research 42 and development employees increased from 70 at december 31 , 2012 to 93 at december 31 , 2013. in addition , we experienced a $ 0.2 million increase in contractor and consulting expenses primarily related to translation services for our products as we expanded our international operations . general and administrative replace_table_token_17_th the increase in general and administrative expense was primarily attributable to a $ 2.9 million increase in salaries and personnel-related costs associated with an increase in general and administrative personnel to support our growing business and fulfill our obligations as a newly public company . the number of full-time general and administrative employees increased from 36 at december 31 , 2012 to 56 at december 31 , 2013. we also experienced a $ 1.5 million increase in professional fees related to legal , consulting and audit and tax services and a $ 0.8 million increase in insurance and tax costs . in addition , we incurred a $ 0.6 million increase in other general corporate costs necessary to support the overall growth in our business . loss on extinguishment of debt during the year ended december 31 , 2013 , we recognized a loss on extinguishment of debt of $ 3.1 million as a result of the prepayment of our subordinated loan , representing the difference between the par value and payoff amount of the subordinated loan , increased by the write-off of unamortized debt issuance costs and accelerated amortization of the remaining debt discount . seasonality our revenue fluctuates as a result of seasonal variations in our business , principally due to the peak consumer demand and related increased volume of our customers ' gmv during the year-end holiday season . as a result , we have historically had higher revenue in our fourth quarter than other quarters in a given year due to increased gmv processed through our platform , resulting in higher variable subscription fees . liquidity and capital resources sources of liquidity prior to our ipo in may 2013 , we funded our operations primarily through cash from operating

cash flows operating activities our cash flows from operating activities are largely driven by the amount of cash we invest in personnel and infrastructure to support the anticipated growth of our business , the increase in the amount of customers using our platform and the amount and timing of customer payments . our cash flows from operations are affected by the seasonality of our business as noted above . as a result , we experience variations in the timing of invoicing and the receipt of payments from our customers . for the year ended december 31 , 2014 , our cash used in operating activities of $ 21.5 million consisted of a net loss of $ 34.5 million and $ 2.7 million of cash used in changes in working capital , partially offset by $ 15.7 million in adjustments for non-cash items . adjustments for non-cash items primarily consisted of non-cash stock compensation expense of $ 8.0 million , depreciation and amortization expense of $ 6.3 million and bad debt expense of $ 1.3 million . the decrease in cash resulting from changes in working capital primarily consisted of a decrease in accounts payable and accrued expenses of $ 2.7 million , primarily driven by timing of payments to our vendors . further , we experienced an increase in accounts receivable of $ 1.4 million as a result of increased revenue and customer growth and an increase in prepaid expenses and other assets of $ 1.1 million due to prepayments of general corporate expenses that we did not incur in 2013. these decreases in cash were partially 44 offset by an increase in operating cash flow due to an increase in deferred revenue of $ 2.4 million as a result of an increased number of customers prepaying for subscription services .


 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.
     ```cash flows operating activities our cash flows from operating activities are largely driven by the amount of cash we invest in personnel and infrastructure to support the anticipated growth of our business , the increase in the amount of customers using our platform and the amount and timing of customer payments . our cash flows from operations are affected by the seasonality of our business as noted above . as a result , we experience variations in the timing of invoicing and the receipt of payments from our customers . for the year ended december 31 , 2014 , our cash used in operating activities of $ 21.5 million consisted of a net loss of $ 34.5 million and $ 2.7 million of cash used in changes in working capital , partially offset by $ 15.7 million in adjustments for non-cash items . adjustments for non-cash items primarily consisted of non-cash stock compensation expense of $ 8.0 million , depreciation and amortization expense of $ 6.3 million and bad debt expense of $ 1.3 million . the decrease in cash resulting from changes in working capital primarily consisted of a decrease in accounts payable and accrued expenses of $ 2.7 million , primarily driven by timing of payments to our vendors . further , we experienced an increase in accounts receivable of $ 1.4 million as a result of increased revenue and customer growth and an increase in prepaid expenses and other assets of $ 1.1 million due to prepayments of general corporate expenses that we did not incur in 2013. these decreases in cash were partially 44 offset by an increase in operating cash flow due to an increase in deferred revenue of $ 2.4 million as a result of an increased number of customers prepaying for subscription services .
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 Suspicious Activity Report : we currently offer the same solutions internationally as we do in the united states , and we intend to continue expanding our international operations . we do not take title to any of the merchandise processed through our platform and we generally do not collect payments on behalf of our customers . we do not hold any inventory of merchandise and we are not involved in the physical logistics of shipping merchandise to buyers , which is handled by our customers . we plan to grow our revenue by adding new customers , helping our existing customers increase their gmv processed through our platform by taking full advantage of its functionality and selling additional module subscriptions to existing customers to allow them to sell merchandise through new channels . we face a variety of challenges and risks , which we will need to address and manage as we pursue our growth strategy . in particular , we will need to continue to innovate in the face of a rapidly changing e-commerce landscape if we are to remain competitive , and we will need to effectively manage our growth , especially related to our international expansion . in addition , as consumer preferences potentially shift from smaller retailers , we need to continue to add large retailers and branded manufacturers as profitable customers . these customers generally pay a lower percentage of gmv as fees based on the high 33 volume of their gmv processed through the platform . we continue to focus our efforts on increasing value for our customers to support higher rates . although e-commerce continues to expand as retailers and manufacturers continue to increase their online sales , it is also becoming more complex and fragmented due to the hundreds of channels available to retailers and manufacturers and the rapid pace of change and innovation across those channels . in order to gain consumers ' attention in a more crowded and competitive online marketplace , many retailers and an increasing number of manufacturers sell their merchandise through multiple online channels , each with its own rules , requirements and specifications . in particular , third-party marketplaces are an increasingly important driver of growth for a number of large online retailers , and as a result we need to continue to support multiple channels in a variety of geographies in order to support our targeted revenue growth . as of december 31 , 2014 , we supported 41 marketplaces , up from 35 at december 31 , 2013 . we believe the growth in e-commerce globally presents an opportunity for retailers and manufacturers to engage in international sales . however , country-specific marketplaces are often the market share leaders in their regions , as is the case for alibaba in asia and mercadolibre in much of latin america . in order to help our customers capitalize on this potential market opportunity , and to address our customers ' needs with respect to cross-border trade , during 2013 and 2014 , we have expanded our presence in the asia-pacific and latin america regions through the opening of two offices in china , an office in brazil and an additional office in australia . doing business overseas involves substantial challenges , including management attention and resources needed to adapt to multiple languages , cultures , laws and commercial infrastructure , as further described in this report under the caption “ risks related to our international operations . ” our senior management continuously focuses on these and other trends and challenges , and we believe that our culture of innovation and our history of growth and expansion will contribute to the success of our business . we can not , however , assure you that we will be successful in addressing and managing the many challenges and risks that we face . key financial and operating performance metrics we regularly monitor a number of financial and operating metrics in order to measure our performance and project our future performance . these metrics aid us in developing and refining our growth strategies and making strategic decisions . we discuss revenue , gross margin and the components of net loss in the section below entitled “ — components of operating results . ” in addition , we utilize other key metrics as described below . core revenue our reported operating results include revenue attributable to the products from two small legacy acquisitions , both of which occurred prior to 2008 and focused on solutions for lower-volume ebay sellers . we do not consider these products to be a core part of our strategic focus going forward . each of these acquisitions contributed a relatively large number of customers with revenue per customer substantially lower than is characteristic of the rest of our business . we exclude the revenue attributable to these non-core , legacy products in calculating a measure we refer to as core revenue . we anticipate that the revenue associated with these non-core , legacy products will continue to decline over time both in absolute terms and as a percentage of our total revenue . number of core customers the number of customers subscribing to our solutions is a primary determinant of our core revenue . we refer to the customers who subscribe to any of our solutions , other than the non-core , legacy products described above , as our core customers . the number of core customers was 2,841 , 2,429 and 1,928 as of december 31 , 2014 , 2013 and 2012 , respectively . average revenue per core customer the average revenue generated by our core customers is the other primary determinant of our core revenue . story_separator_special_tag our revenue from international operations of $ 14.2 million , or 20.8 % of total revenue , for the year ended december 31 , 2013 increased from $ 11.4 million , or 21.4 % of total revenue , for the year ended december 31 , 2012. the increase in revenue from our international operations was primarily attributable to an increase in the number of international customers . during 2013 , we expanded our presence in the asia-pacific and latin america regions . core revenue replace_table_token_13_th 41 the growth in core revenue was primarily attributable to a 26.0 % increase in the number of core customers using our platform at december 31 , 2013 as compared to december 31 , 2012. the increase in core customers accounted for 62.3 % of the increase in core revenue during the year ended december 31 , 2013. in addition , we experienced a 9.3 % increase in the average revenue per core customer during the year ended december 31 , 2013 as compared to the year ended december 31 , 2012 , which accounted for 37.7 % of the increase in core revenue during the period . the increase in the average revenue per core customer was primarily attributable to an overall increase in transaction volume and , to a lesser extent , to modest overall increases in the percentage fees assessed on the fixed and variable portions of gmv under our contractual arrangements with some of our customers during the year . because we generally enter into annual contracts with our customers , we may renegotiate either or both of the fixed and variable components of the pricing structure of a customer 's contract each year . in addition , the increase in average revenue per core customer was due in part to a general shift in our customer base toward a greater proportion of larger enterprise customers , all of which are core customers . our enterprise customers generally commit to a higher specified minimum amount of gmv per month , which results in a higher proportion of fixed subscription fees . cost of revenue replace_table_token_14_th the increase in cost of revenue was primarily attributable to a $ 2.2 million increase in salaries and personnel-related costs , as we increased the number of employees providing services to our expanding customer base and supporting our platform infrastructure from 110 at december 31 , 2012 to 144 at december 31 , 2013. in addition , we experienced a $ 0.7 million increase in depreciation expense associated with equipment for our data centers and a $ 0.3 million increase in credit card vendor transaction fees . as a percentage of revenue , cost of revenue declined from 27.5 % for the year ended december 31 , 2012 to 26.6 % for the year ended december 31 , 2013. operating expenses sales and marketing replace_table_token_15_th the increase in sales and marketing expense was primarily attributable to a $ 9.6 million increase in salaries and personnel-related costs , as we increased the number of sales and marketing and customer support personnel to continue driving revenue growth . the number of full-time sales and marketing employees increased from 189 at december 31 , 2012 to 301 at december 31 , 2013. in addition , we experienced a $ 3.1 million increase in our marketing and advertising expenses , promotional event programs and travel costs . the increase in sales and marketing expense as a percentage of revenue for the year ended december 31 , 2013 reflects the implementation of our strategy of hiring new sales and marketing professionals and expanding our marketing activities in order to continue to grow our business . research and development replace_table_token_16_th the increase in research and development expense was primarily attributable to a $ 2.1 million increase in salaries and personnel-related costs associated with an increase in research and development personnel . the number of full-time research 42 and development employees increased from 70 at december 31 , 2012 to 93 at december 31 , 2013. in addition , we experienced a $ 0.2 million increase in contractor and consulting expenses primarily related to translation services for our products as we expanded our international operations . general and administrative replace_table_token_17_th the increase in general and administrative expense was primarily attributable to a $ 2.9 million increase in salaries and personnel-related costs associated with an increase in general and administrative personnel to support our growing business and fulfill our obligations as a newly public company . the number of full-time general and administrative employees increased from 36 at december 31 , 2012 to 56 at december 31 , 2013. we also experienced a $ 1.5 million increase in professional fees related to legal , consulting and audit and tax services and a $ 0.8 million increase in insurance and tax costs . in addition , we incurred a $ 0.6 million increase in other general corporate costs necessary to support the overall growth in our business . loss on extinguishment of debt during the year ended december 31 , 2013 , we recognized a loss on extinguishment of debt of $ 3.1 million as a result of the prepayment of our subordinated loan , representing the difference between the par value and payoff amount of the subordinated loan , increased by the write-off of unamortized debt issuance costs and accelerated amortization of the remaining debt discount . seasonality our revenue fluctuates as a result of seasonal variations in our business , principally due to the peak consumer demand and related increased volume of our customers ' gmv during the year-end holiday season . as a result , we have historically had higher revenue in our fourth quarter than other quarters in a given year due to increased gmv processed through our platform , resulting in higher variable subscription fees . liquidity and capital resources sources of liquidity prior to our ipo in may 2013 , we funded our operations primarily through cash from operating

