replace_table_token_2_th our prime contractor revenues as a percentage of our total revenues were 88 % , 89 % and 91 % for the years ended december 31 , 2015 , 2014 and 2013 , respectively . we provide our services and solutions under three types of contracts : cost-reimbursable ; time-and-materials ; and fixed-price . cost-reimbursable contracts -under cost-reimbursable contracts , we are reimbursed for costs that are determined to be reasonable , allowable and allocable to the contract and paid a fee representing the profit margin negotiated between us and the contracting agency , which may be fixed or performance based . under cost-reimbursable contracts we recognize revenues and an estimate of applicable fees earned as costs are incurred . we consider fixed fees under cost-reimbursable contracts to be earned in proportion to the allowable costs incurred in performance of the contract . for performance based fees under cost-reimbursable contracts , we recognize the relevant portion of the expected fee to be awarded by the customer at the time such fee can be reasonably estimated , based on factors such as our prior award experience and communications with the customer regarding performance , or upon customer approval . fixed-price contracts -under fixed-price contracts , we perform specific tasks for a fixed price . fixed-price contracts may include either a product delivery or specific service performance over a defined period . revenues on fixed-price contracts that provide for the company to render services throughout a period are recognized as earned according to contract terms as the service is provided on a proportionate performance basis . for fixed-price contracts that provide for the delivery of a specific product with related customer acceptance provisions , revenues are recognized as those products are delivered and accepted . time-and-materials contracts -under time-and-materials contracts , we are reimbursed for labor at fixed hourly rates and generally reimbursed separately for allowable materials , costs and expenses at cost . we recognize revenues under time-and- 23 materials contracts by multiplying the number of direct labor hours expended by the contract billing rates and adding the effect of other billable direct costs . our contract mix varies from year-to-year due to numerous factors , including our business strategies and u.s. government procurement objectives . the following table shows revenues from each of these types of contracts as a percentage of total revenues for the periods presented . replace_table_token_3_th under cost-reimbursable contracts , there is limited financial risk , because we are reimbursed for all allowable direct and indirect costs . however , profit margins on this type of contract tend to be lower than on time-and-materials and fixed-price contracts . cost of services cost of services primarily includes direct costs incurred to provide services and solutions to our customers . the most significant portion of these costs are direct labor costs , including salaries and wages , plus associated fringe benefits of our employees directly serving customers , in addition to the related management , facilities and infrastructure costs . cost of services also includes other direct costs , such as the costs of subcontractors and outside consultants and third-party materials , including hardware or software that we purchase and provide to the customer as part of an integrated solution . changes in the mix of services and equipment provided under our contracts can result in variability in our contract margins . since we earn higher profits on our own labor services , we expect the ratio of cost of services as a percent of revenues to decline when our labor services mix increases relative to subcontracted labor or third-party materials . conversely , as subcontracted labor or third-party material purchases for customers increases relative to our own labor services , we expect the ratio of cost of services as a percent of revenues to increase . the proportion that cost of services bears to revenues varies in part based on our mix of revenues by contract type . in general , cost-reimbursable contracts are the least profitable of our government contracts but offer the lowest risk of loss . under time-and-materials contracts , to the extent that our actual labor costs are higher or lower than the billing rates under the contract , our profit under the contract may either be greater or less than we anticipated or we may suffer a loss under the contract . in general , we realize a higher profit margin on work performed under time-and-materials contracts than cost-reimbursable contracts . fixed-price contracts generally offer higher profit margin opportunities but can involve greater financial risk because we bear the impact of cost overruns in return for the full benefit of any cost savings . general and administrative expenses general and administrative expenses include the salaries and wages , plus associated fringe benefits of our employees not performing work directly for customers , and associated facilities costs . among the functions covered by these costs are corporate business development , bid and proposal , contracts administration , finance and accounting , legal , corporate governance and executive and senior management . in addition , we included stock-based compensation , as well as depreciation and amortization expenses related to the general and administrative function . depreciation and amortization expenses include the depreciation of computers , furniture and other equipment , the amortization of third party software we use internally , leasehold improvements and intangible assets . intangible assets include customer relationships and contract backlogs acquired in business combinations , and are amortized over their estimated useful lives . we classify indirect costs incurred as cost of services and general and administrative expenses in the same manner as such costs are defined in our disclosure statements under u.s. government cost accounting standards . story_separator_special_tag for long-term contracts , specifically described in the scope section of accounting standards codification ( asc ) 605-35 , revenue recognition - construction-type and production-type contracts , we apply the percentage of completion method . under the percentage of completion method , income is recognized at a consistent profit margin over the period of performance based on estimated profit margins at completion of the contract . this method of accounting requires estimating the total revenues and total contract cost at completion of the contract . during the performance of long-term contracts , these estimates are periodically reviewed and revisions are made as required using the cumulative catch-up method of accounting . the impact on revenues and contract profit as a result of these revisions is included in the periods in which the revisions are made . this method can result in the deferral of costs or the deferral of profit on these contracts . because we assume the risk of performing a fixed-price contract at a set price , the failure to accurately estimate ultimate costs or to control costs during performance of the work could result , and in some instances has resulted , in reduced profits or losses for such contracts . estimated losses on contracts at completion are recognized when identified . in certain circumstances , revenues are recognized when contract amendments have not been finalized . accounting for business combinations , goodwill and other intangible assets the purchase price of an acquired business is allocated to the tangible assets , financial assets and separately recognized intangible assets acquired less liabilities assumed based upon their respective fair values , with the excess recorded as goodwill . such fair value assessments require judgments and estimates that can be affected by contract performance and other factors over time , which may cause final amounts to differ materially from original estimates . we review goodwill at least annually for impairment , or whenever events or circumstances indicate that the carrying value of long-lived assets may not be fully recoverable . we perform this review at the reporting unit level , which is one level below our one reportable segment . in reviewing goodwill for impairment , we have the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the estimated fair value of a reporting unit is less than its carrying amount . if we elect to perform a qualitative assessment and determine that an impairment is more likely than not , the entity is then required to perform the existing two-step quantitative impairment test ( described below ) , otherwise no further analysis is required . we also may elect not to perform the qualitative assessment and , instead , proceed directly to the two-step quantitative impairment test . 31 the goodwill impairment test is a two-step process performed at the reporting unit level . the first step of the goodwill impairment test compares the fair value of a reporting unit with its carrying value ( including goodwill ) . if the reporting unit 's fair value exceeds its carrying value , no further procedures are required . however , if the reporting unit 's fair value is less than its carrying value , an impairment of goodwill may exist , requiring a second step to be performed . step two of this test measures the amount of the impairment loss , if any . step two of this test requires the allocation of the reporting unit 's fair value to its assets and liabilities , including any unrecognized intangible assets , in a hypothetical analysis that calculates the implied fair value of goodwill as if the reporting unit were being acquired in a business combination . if the implied fair value of goodwill is less than the carrying value , the difference is recorded as a goodwill impairment charge in operations . the fair values of the reporting units are determined based on a weighting of the income approach , market approach and market transaction approach . the income approach is a valuation technique in which fair value is based from forecasted future cash flow discounted at the appropriate rate of return commensurate with the risk as well as current rates of return for equity and debt capital as of the valuation date . the forecast used in our estimation of fair value was developed by management based on a contract basis , incorporating adjustments to reflect known contract and market considerations ( such as reductions and uncertainty in government spending , pricing pressure and opportunities ) . the discount rate utilizes a risk adjusted weighted average cost of capital . the market approach is a valuation technique in which the fair value is calculated based on market prices realized in an actual arm 's length transaction . the technique consists of undertaking a detailed market analysis of publicly traded companies that provides a reasonable basis for comparison to the company . valuation ratios , which relate market prices to selected financial statistics derived from comparable companies , are selected and applied to the company after consideration of adjustments for financial position , growth , market , profitability and other factors . the market transaction approach is a valuation technique in which the fair value is calculated based on market prices realized in actual arm 's length transactions . the technique consists of undertaking a detailed market analysis of merged and acquired companies that provides a reasonable basis for comparison to the company . valuation ratios , which relate market prices to selected financial statistics derived from comparable companies , are selected and applied to the company after consideration of adjustments for financial position , growth , market , profitability and other factors . to assess the reasonableness of the calculated reporting unit fair values , we compare the sum of the reporting units ' fair values to the company

cash flows from operating activities our operating cash flow is primarily affected by our ability to invoice and collect from our clients in a timely manner , our ability to manage our vendor payments and the overall profitability of our contracts . we bill most of our customers monthly after services are rendered . our accounts receivable days sales outstanding ( dso ) were 68 and 83 for the years ended december 31 , 2015 and 2014 , respectively . this improvement is due to efficiencies made in our billing processes and a greater focus on collections . in 2016 , we expect dso levels to remain consistent with 2015 levels . for the years ended december 31 , 2015 , 2014 and 2013 , our net cash flows from operating activities were $ 153.9 million , $ 126.9 million and $ 188.3 million , respectively . the increase in net cash flows from operating activities during the year ended december 31 , 2015 when compared to the same period in 2014 was primarily due to significant improvements in our dso , our ability to manage vendor payments and higher net income . the decrease in net cash flows from operating activities during the year ended december 31 , 2014 compared to the same period in 2013 was primarily due to lower amounts of income , excluding the effects of the 2013 non-cash goodwill impairment charge , and a lower volume of sales in 2014. cash flows from investing activities our cash flow from investing activities consists primarily of business combinations , purchases of property and equipment and investments in capitalized software for internal use . for the years ended december 31 , 2015 , 2014 and 2013 our net cash outflows from investing activities were $ 112.7 million , $ 135.9 million and $ 24.8 million , respectively . for the year ended december 31 , 2015 , our net cash outflows from investing activities were primarily due to the acquisitions of kcg and welkin , our investment in countertack inc. and capital expenditures .


 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 from operating activities our operating cash flow is primarily affected by our ability to invoice and collect from our clients in a timely manner , our ability to manage our vendor payments and the overall profitability of our contracts . we bill most of our customers monthly after services are rendered . our accounts receivable days sales outstanding ( dso ) were 68 and 83 for the years ended december 31 , 2015 and 2014 , respectively . this improvement is due to efficiencies made in our billing processes and a greater focus on collections . in 2016 , we expect dso levels to remain consistent with 2015 levels . for the years ended december 31 , 2015 , 2014 and 2013 , our net cash flows from operating activities were $ 153.9 million , $ 126.9 million and $ 188.3 million , respectively . the increase in net cash flows from operating activities during the year ended december 31 , 2015 when compared to the same period in 2014 was primarily due to significant improvements in our dso , our ability to manage vendor payments and higher net income . the decrease in net cash flows from operating activities during the year ended december 31 , 2014 compared to the same period in 2013 was primarily due to lower amounts of income , excluding the effects of the 2013 non-cash goodwill impairment charge , and a lower volume of sales in 2014. cash flows from investing activities our cash flow from investing activities consists primarily of business combinations , purchases of property and equipment and investments in capitalized software for internal use . for the years ended december 31 , 2015 , 2014 and 2013 our net cash outflows from investing activities were $ 112.7 million , $ 135.9 million and $ 24.8 million , respectively . for the year ended december 31 , 2015 , our net cash outflows from investing activities were primarily due to the acquisitions of kcg and welkin , our investment in countertack inc. and capital expenditures .
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 Suspicious Activity Report : replace_table_token_2_th our prime contractor revenues as a percentage of our total revenues were 88 % , 89 % and 91 % for the years ended december 31 , 2015 , 2014 and 2013 , respectively . we provide our services and solutions under three types of contracts : cost-reimbursable ; time-and-materials ; and fixed-price . cost-reimbursable contracts -under cost-reimbursable contracts , we are reimbursed for costs that are determined to be reasonable , allowable and allocable to the contract and paid a fee representing the profit margin negotiated between us and the contracting agency , which may be fixed or performance based . under cost-reimbursable contracts we recognize revenues and an estimate of applicable fees earned as costs are incurred . we consider fixed fees under cost-reimbursable contracts to be earned in proportion to the allowable costs incurred in performance of the contract . for performance based fees under cost-reimbursable contracts , we recognize the relevant portion of the expected fee to be awarded by the customer at the time such fee can be reasonably estimated , based on factors such as our prior award experience and communications with the customer regarding performance , or upon customer approval . fixed-price contracts -under fixed-price contracts , we perform specific tasks for a fixed price . fixed-price contracts may include either a product delivery or specific service performance over a defined period . revenues on fixed-price contracts that provide for the company to render services throughout a period are recognized as earned according to contract terms as the service is provided on a proportionate performance basis . for fixed-price contracts that provide for the delivery of a specific product with related customer acceptance provisions , revenues are recognized as those products are delivered and accepted . time-and-materials contracts -under time-and-materials contracts , we are reimbursed for labor at fixed hourly rates and generally reimbursed separately for allowable materials , costs and expenses at cost . we recognize revenues under time-and- 23 materials contracts by multiplying the number of direct labor hours expended by the contract billing rates and adding the effect of other billable direct costs . our contract mix varies from year-to-year due to numerous factors , including our business strategies and u.s. government procurement objectives . the following table shows revenues from each of these types of contracts as a percentage of total revenues for the periods presented . replace_table_token_3_th under cost-reimbursable contracts , there is limited financial risk , because we are reimbursed for all allowable direct and indirect costs . however , profit margins on this type of contract tend to be lower than on time-and-materials and fixed-price contracts . cost of services cost of services primarily includes direct costs incurred to provide services and solutions to our customers . the most significant portion of these costs are direct labor costs , including salaries and wages , plus associated fringe benefits of our employees directly serving customers , in addition to the related management , facilities and infrastructure costs . cost of services also includes other direct costs , such as the costs of subcontractors and outside consultants and third-party materials , including hardware or software that we purchase and provide to the customer as part of an integrated solution . changes in the mix of services and equipment provided under our contracts can result in variability in our contract margins . since we earn higher profits on our own labor services , we expect the ratio of cost of services as a percent of revenues to decline when our labor services mix increases relative to subcontracted labor or third-party materials . conversely , as subcontracted labor or third-party material purchases for customers increases relative to our own labor services , we expect the ratio of cost of services as a percent of revenues to increase . the proportion that cost of services bears to revenues varies in part based on our mix of revenues by contract type . in general , cost-reimbursable contracts are the least profitable of our government contracts but offer the lowest risk of loss . under time-and-materials contracts , to the extent that our actual labor costs are higher or lower than the billing rates under the contract , our profit under the contract may either be greater or less than we anticipated or we may suffer a loss under the contract . in general , we realize a higher profit margin on work performed under time-and-materials contracts than cost-reimbursable contracts . fixed-price contracts generally offer higher profit margin opportunities but can involve greater financial risk because we bear the impact of cost overruns in return for the full benefit of any cost savings . general and administrative expenses general and administrative expenses include the salaries and wages , plus associated fringe benefits of our employees not performing work directly for customers , and associated facilities costs . among the functions covered by these costs are corporate business development , bid and proposal , contracts administration , finance and accounting , legal , corporate governance and executive and senior management . in addition , we included stock-based compensation , as well as depreciation and amortization expenses related to the general and administrative function . depreciation and amortization expenses include the depreciation of computers , furniture and other equipment , the amortization of third party software we use internally , leasehold improvements and intangible assets . intangible assets include customer relationships and contract backlogs acquired in business combinations , and are amortized over their estimated useful lives . we classify indirect costs incurred as cost of services and general and administrative expenses in the same manner as such costs are defined in our disclosure statements under u.s. government cost accounting standards . story_separator_special_tag for long-term contracts , specifically described in the scope section of accounting standards codification ( asc ) 605-35 , revenue recognition - construction-type and production-type contracts , we apply the percentage of completion method . under the percentage of completion method , income is recognized at a consistent profit margin over the period of performance based on estimated profit margins at completion of the contract . this method of accounting requires estimating the total revenues and total contract cost at completion of the contract . during the performance of long-term contracts , these estimates are periodically reviewed and revisions are made as required using the cumulative catch-up method of accounting . the impact on revenues and contract profit as a result of these revisions is included in the periods in which the revisions are made . this method can result in the deferral of costs or the deferral of profit on these contracts . because we assume the risk of performing a fixed-price contract at a set price , the failure to accurately estimate ultimate costs or to control costs during performance of the work could result , and in some instances has resulted , in reduced profits or losses for such contracts . estimated losses on contracts at completion are recognized when identified . in certain circumstances , revenues are recognized when contract amendments have not been finalized . accounting for business combinations , goodwill and other intangible assets the purchase price of an acquired business is allocated to the tangible assets , financial assets and separately recognized intangible assets acquired less liabilities assumed based upon their respective fair values , with the excess recorded as goodwill . such fair value assessments require judgments and estimates that can be affected by contract performance and other factors over time , which may cause final amounts to differ materially from original estimates . we review goodwill at least annually for impairment , or whenever events or circumstances indicate that the carrying value of long-lived assets may not be fully recoverable . we perform this review at the reporting unit level , which is one level below our one reportable segment . in reviewing goodwill for impairment , we have the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the estimated fair value of a reporting unit is less than its carrying amount . if we elect to perform a qualitative assessment and determine that an impairment is more likely than not , the entity is then required to perform the existing two-step quantitative impairment test ( described below ) , otherwise no further analysis is required . we also may elect not to perform the qualitative assessment and , instead , proceed directly to the two-step quantitative impairment test . 31 the goodwill impairment test is a two-step process performed at the reporting unit level . the first step of the goodwill impairment test compares the fair value of a reporting unit with its carrying value ( including goodwill ) . if the reporting unit 's fair value exceeds its carrying value , no further procedures are required . however , if the reporting unit 's fair value is less than its carrying value , an impairment of goodwill may exist , requiring a second step to be performed . step two of this test measures the amount of the impairment loss , if any . step two of this test requires the allocation of the reporting unit 's fair value to its assets and liabilities , including any unrecognized intangible assets , in a hypothetical analysis that calculates the implied fair value of goodwill as if the reporting unit were being acquired in a business combination . if the implied fair value of goodwill is less than the carrying value , the difference is recorded as a goodwill impairment charge in operations . the fair values of the reporting units are determined based on a weighting of the income approach , market approach and market transaction approach . the income approach is a valuation technique in which fair value is based from forecasted future cash flow discounted at the appropriate rate of return commensurate with the risk as well as current rates of return for equity and debt capital as of the valuation date . the forecast used in our estimation of fair value was developed by management based on a contract basis , incorporating adjustments to reflect known contract and market considerations ( such as reductions and uncertainty in government spending , pricing pressure and opportunities ) . the discount rate utilizes a risk adjusted weighted average cost of capital . the market approach is a valuation technique in which the fair value is calculated based on market prices realized in an actual arm 's length transaction . the technique consists of undertaking a detailed market analysis of publicly traded companies that provides a reasonable basis for comparison to the company . valuation ratios , which relate market prices to selected financial statistics derived from comparable companies , are selected and applied to the company after consideration of adjustments for financial position , growth , market , profitability and other factors . the market transaction approach is a valuation technique in which the fair value is calculated based on market prices realized in actual arm 's length transactions . the technique consists of undertaking a detailed market analysis of merged and acquired companies that provides a reasonable basis for comparison to the company . valuation ratios , which relate market prices to selected financial statistics derived from comparable companies , are selected and applied to the company after consideration of adjustments for financial position , growth , market , profitability and other factors . to assess the reasonableness of the calculated reporting unit fair values , we compare the sum of the reporting units ' fair values to the company

