sg & a is an important financial metric that we analyze to help us evaluate the contribution of our selling , marketing and proposal activities to revenue generation . 54 other income and expenses other income and expenses includes interest income , interest expense , changes in fair value of certain financial investments , gains/losses on sale of available-for-sale equity securities and losses from equity method investments . income tax expense our effective tax rates are substantially lower than the statutory rates primarily due to research and development tax credits . critical accounting policies and estimates management 's discussion and analysis of financial condition and results of operations discusses our consolidated financial statements , which have been prepared in accordance with accounting principles generally accepted in the united states . when we prepare these consolidated financial statements , we are required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period . some of our accounting policies require that we make subjective judgments , including estimates that involve matters that are inherently uncertain . our most critical estimates include those related to revenue recognition , inventories and reserves for excess and obsolescence , self-insured liabilities , accounting for stock-based awards , and income taxes . we base our estimates and judgments on historical experience and on various other factors that we believe to be reasonable under the circumstances , the results of which form the basis for our judgments about the carrying values of assets and liabilities that are not readily apparent from other sources . our actual results may differ from these estimates under different assumptions or conditions . we believe the following critical accounting estimates affect our more significant judgments and estimates used in preparing our consolidated financial statements . see note 1 of the notes to consolidated financial statements for our organization and significant accounting policies . there have been no material changes made to the critical accounting estimates during the periods presented in the consolidated financial statements . revenue recognition significant management judgments and estimates must be made and used in connection with the recognition of revenue in any accounting period . material differences in the amount of revenue in any given period may result if these judgments or estimates prove to be incorrect or if management 's estimates change on the basis of development of the business or market conditions . management judgments and estimates have been applied consistently and have been reliable historically . we believe that there are two key factors which impact the reliability of management 's estimates . the first of those key factors is that the terms of our contracts are typically less than six months . the short-term nature of such contracts reduces the risk that material changes in accounting estimates will occur on the basis of market conditions or other factors . the second key factor is that we have hundreds of contracts in any given accounting period , which reduces the risk that any one change in an accounting estimate on one or several contracts would have a material impact on our consolidated financial statements or our two reporting segments ' measures of profit . the substantial majority of our revenue is generated pursuant to written contractual arrangements to design , develop , manufacture and or modify complex products , and to provide related engineering , technical and other services according to customer specifications . these contracts may be fixed price or cost-reimbursable . we consider all contracts for treatment in accordance with authoritative guidance for contracts with multiple deliverables . 55 revenue from product sales not under contractual arrangement is recognized at the time title and the risk and rewards of ownership pass , which typically occurs when the products are shipped and collection is reasonably assured . revenue and profits on fixed-price contracts are recognized using percentage-of-completion methods of accounting . revenue and profits on fixed-price production contracts , whose units are produced and delivered in a continuous or sequential process , are recorded as units are delivered based on their selling prices , or the units-of-delivery method . revenue and profits on other fixed-price contracts with significant engineering as well as production requirements are recorded based on the ratio of total actual incurred costs to date to the total estimated costs for each contract , or the cost-to-cost method . under percentage-of-completion methods of accounting , a single estimated total profit margin is used to recognize profit for each contract over its entire period of performance , which can exceed one year . accounting for revenue and profits on a fixed-price contract requires the preparation of estimates of ( 1 ) the total contract revenue , ( 2 ) the total costs at completion , which is equal to the sum of the actual incurred costs to date on the contract and the estimated costs to complete the contract 's statement of work and ( 3 ) the measurement of progress towards completion . the estimated profit or loss at completion on a contract is equal to the difference between the total estimated contract revenue and the total estimated cost at completion . under the units-of-delivery method , sales on a fixed-price type contract are recorded as the units are delivered during the period based on their contractual selling prices . under the cost-to-cost method , sales on a fixed-price type contract are recorded at amounts equal to the ratio of actual cumulative costs incurred divided by total estimated costs at completion , multiplied by ( a ) the total estimated contract revenue , less ( b ) the cumulative sales recognized in prior periods . story_separator_special_tag uas gross margin increased $ 1.7 million , or 2 % , to $ 80.8 million for the fiscal year ended april 30 , 2014 , primarily due to an increase in sales volume . as a percentage of revenue , gross margin for uas decreased from 41 % to 39 % . ees gross margin decreased $ 0.7 million , or 5 % , to $ 12.8 million for the fiscal year ended april 30 , 2014. as a percentage of revenue , ees gross margin increased from 29 % to 30 % . selling , general and administrative . sg & a expense for the fiscal year ended april 30 , 2014 was $ 55.7 million , or 22 % of revenue , compared to sg & a expense of $ 51.5 million , or 21 % of revenue , for the fiscal year ended april 30 , 2013. sg & a expense increased by $ 4.2 million primarily due to impairment costs of tier-ii related assets and higher incentive compensation as a result of achieving certain measures of financial performance . research and development . r & d expense for the fiscal year ended april 30 , 2014 was $ 25.5 million , or 10 % of revenue , compared to r & d expense of $ 37.2 million , or 15 % of revenue , for the fiscal year ended april 30 , 2013. r & d expense decreased primarily due to decreased investments in various technology development initiatives . interest income . interest income for the fiscal year ended april 30 , 2014 was $ 0.9 million , as compared to $ 0.7 million for the fiscal year ended april 30 , 2013. other income . other income for the fiscal year ended april 30 , 2014 was $ 1.6 million , as compared to $ 6.2 million for the fiscal year ended april 30 , 2013. other income primarily represents the change in fair value of the conversion feature of our investment in convertible bonds . income tax expense . our effective income tax expense rate was 7.9 % for the fiscal year ended april 30 , 2014 , as compared to an effective income expense tax rate of 3.2 % for the fiscal year ended april 30 , 2013. the increase in the effective income tax expense rate was primarily due to higher taxable income and lower r & d tax credits . liquidity and capital resources we currently have no material cash commitments , except for normal recurring trade payables , accrued expenses and ongoing research and development costs , all of which we anticipate funding through our existing working capital and funds provided by operating activities . the majority of our purchase obligations are pursuant to funded contractual arrangements with our customers . in addition , we do not currently anticipate significant investment in property , plant and equipment , and we believe that our existing cash , cash equivalents , cash provided by operating activities and other financing sources will be sufficient to meet our anticipated working capital , capital expenditure and debt service requirements , if any , during the next twelve months . there can be no assurance , however , that our business will continue to generate cash flow at current levels . if we are unable to generate sufficient cash flow from operations , then we may be required to sell assets , reduce capital expenditures or obtain additional financing . we anticipate that existing sources of liquidity and cash flows from operations will be sufficient to satisfy our cash needs for the foreseeable future . our primary liquidity needs are for financing working capital , investing in capital expenditures , supporting product development efforts , introducing new products and enhancing existing products , and marketing acceptance and adoption of our products and services . our future capital requirements , to a certain extent , are also subject to general conditions in or affecting the defense and electric vehicle 61 industries and are subject to general economic , political , financial , competitive , legislative and regulatory factors that are beyond our control . moreover , to the extent that existing cash , cash equivalents , cash from operations , and cash from short-term borrowing are insufficient to fund our future activities , we may need to raise additional funds through public or private equity or debt financing . in addition , we may also need to seek additional equity funding or debt financing if we become a party to any agreement or letter of intent for potential investments in , or acquisitions of , businesses , services or technologies . our working capital requirements vary by contract type . on cost-plus-fee programs , we typically bill our incurred costs and fees monthly as work progresses , and therefore working capital investment is minimal . on fixed-price contracts , we typically are paid as we deliver products , and working capital is needed to fund labor and expenses incurred during the lead time from contract award until contract deliveries begin . story_separator_special_tag size= `` 2 `` > revenue from contracts with customers ( topic 606 ) . the new revenue recognition standard provides a five-step analysis of transactions to determine when and how revenue is recognized . the core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services . this asu is effective for annual periods beginning after december 15 , 2017 and shall be applied either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption . we are evaluating the potential impact of this adoption on our consolidated financial statements . in june 2014 , the fasb issued asu no . 2014-12 , compensationstock compensation (

cash flows the following table provides our cash flow data as of : replace_table_token_9_th cash provided by operating activities . net cash provided by operating activities for the fiscal year ended april 30 , 2015 increased by $ 5.4 million to $ 39.4 million , compared to net cash provided by operating activities of $ 34.0 million for the fiscal year ended april 30 , 2014. this increase in net cash provided by operating activities was primarily due to higher working capital generated of $ 16.1 million , a higher loss on disposal of fixed assets of $ 3.7 million and a change in fair value of the cybaero notes of $ 1.7 million , partially offset by lower net income of $ 10.8 million , lower impairment of long-lived assets of $ 2.9 million , lower tax benefits of $ 2.3 million and lower depreciation expense of $ 0.8 million . net cash provided by operating activities for the fiscal year ended april 30 , 2014 increased by $ 4.8 million to $ 34.0 million , compared to net cash provided by operating activities of $ 29.2 million for the fiscal year ended april 30 , 2013. this increase in net cash provided by operating activities was primarily due to the change in fair value of the cybaero notes of $ 4.4 million , impairment of tier-ii related assets of $ 3.3 million , higher net income of $ 3.3 million and higher working capital generated of $ 2.9 million , partially offset by higher deferred income taxes of $ 7.0 million and lower depreciation expense of $ 1.8 million . cash ( used in ) provided by investing activities .


 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 the following table provides our cash flow data as of : replace_table_token_9_th cash provided by operating activities . net cash provided by operating activities for the fiscal year ended april 30 , 2015 increased by $ 5.4 million to $ 39.4 million , compared to net cash provided by operating activities of $ 34.0 million for the fiscal year ended april 30 , 2014. this increase in net cash provided by operating activities was primarily due to higher working capital generated of $ 16.1 million , a higher loss on disposal of fixed assets of $ 3.7 million and a change in fair value of the cybaero notes of $ 1.7 million , partially offset by lower net income of $ 10.8 million , lower impairment of long-lived assets of $ 2.9 million , lower tax benefits of $ 2.3 million and lower depreciation expense of $ 0.8 million . net cash provided by operating activities for the fiscal year ended april 30 , 2014 increased by $ 4.8 million to $ 34.0 million , compared to net cash provided by operating activities of $ 29.2 million for the fiscal year ended april 30 , 2013. this increase in net cash provided by operating activities was primarily due to the change in fair value of the cybaero notes of $ 4.4 million , impairment of tier-ii related assets of $ 3.3 million , higher net income of $ 3.3 million and higher working capital generated of $ 2.9 million , partially offset by higher deferred income taxes of $ 7.0 million and lower depreciation expense of $ 1.8 million . cash ( used in ) provided by investing activities .
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 Suspicious Activity Report : sg & a is an important financial metric that we analyze to help us evaluate the contribution of our selling , marketing and proposal activities to revenue generation . 54 other income and expenses other income and expenses includes interest income , interest expense , changes in fair value of certain financial investments , gains/losses on sale of available-for-sale equity securities and losses from equity method investments . income tax expense our effective tax rates are substantially lower than the statutory rates primarily due to research and development tax credits . critical accounting policies and estimates management 's discussion and analysis of financial condition and results of operations discusses our consolidated financial statements , which have been prepared in accordance with accounting principles generally accepted in the united states . when we prepare these consolidated financial statements , we are required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period . some of our accounting policies require that we make subjective judgments , including estimates that involve matters that are inherently uncertain . our most critical estimates include those related to revenue recognition , inventories and reserves for excess and obsolescence , self-insured liabilities , accounting for stock-based awards , and income taxes . we base our estimates and judgments on historical experience and on various other factors that we believe to be reasonable under the circumstances , the results of which form the basis for our judgments about the carrying values of assets and liabilities that are not readily apparent from other sources . our actual results may differ from these estimates under different assumptions or conditions . we believe the following critical accounting estimates affect our more significant judgments and estimates used in preparing our consolidated financial statements . see note 1 of the notes to consolidated financial statements for our organization and significant accounting policies . there have been no material changes made to the critical accounting estimates during the periods presented in the consolidated financial statements . revenue recognition significant management judgments and estimates must be made and used in connection with the recognition of revenue in any accounting period . material differences in the amount of revenue in any given period may result if these judgments or estimates prove to be incorrect or if management 's estimates change on the basis of development of the business or market conditions . management judgments and estimates have been applied consistently and have been reliable historically . we believe that there are two key factors which impact the reliability of management 's estimates . the first of those key factors is that the terms of our contracts are typically less than six months . the short-term nature of such contracts reduces the risk that material changes in accounting estimates will occur on the basis of market conditions or other factors . the second key factor is that we have hundreds of contracts in any given accounting period , which reduces the risk that any one change in an accounting estimate on one or several contracts would have a material impact on our consolidated financial statements or our two reporting segments ' measures of profit . the substantial majority of our revenue is generated pursuant to written contractual arrangements to design , develop , manufacture and or modify complex products , and to provide related engineering , technical and other services according to customer specifications . these contracts may be fixed price or cost-reimbursable . we consider all contracts for treatment in accordance with authoritative guidance for contracts with multiple deliverables . 55 revenue from product sales not under contractual arrangement is recognized at the time title and the risk and rewards of ownership pass , which typically occurs when the products are shipped and collection is reasonably assured . revenue and profits on fixed-price contracts are recognized using percentage-of-completion methods of accounting . revenue and profits on fixed-price production contracts , whose units are produced and delivered in a continuous or sequential process , are recorded as units are delivered based on their selling prices , or the units-of-delivery method . revenue and profits on other fixed-price contracts with significant engineering as well as production requirements are recorded based on the ratio of total actual incurred costs to date to the total estimated costs for each contract , or the cost-to-cost method . under percentage-of-completion methods of accounting , a single estimated total profit margin is used to recognize profit for each contract over its entire period of performance , which can exceed one year . accounting for revenue and profits on a fixed-price contract requires the preparation of estimates of ( 1 ) the total contract revenue , ( 2 ) the total costs at completion , which is equal to the sum of the actual incurred costs to date on the contract and the estimated costs to complete the contract 's statement of work and ( 3 ) the measurement of progress towards completion . the estimated profit or loss at completion on a contract is equal to the difference between the total estimated contract revenue and the total estimated cost at completion . under the units-of-delivery method , sales on a fixed-price type contract are recorded as the units are delivered during the period based on their contractual selling prices . under the cost-to-cost method , sales on a fixed-price type contract are recorded at amounts equal to the ratio of actual cumulative costs incurred divided by total estimated costs at completion , multiplied by ( a ) the total estimated contract revenue , less ( b ) the cumulative sales recognized in prior periods . story_separator_special_tag uas gross margin increased $ 1.7 million , or 2 % , to $ 80.8 million for the fiscal year ended april 30 , 2014 , primarily due to an increase in sales volume . as a percentage of revenue , gross margin for uas decreased from 41 % to 39 % . ees gross margin decreased $ 0.7 million , or 5 % , to $ 12.8 million for the fiscal year ended april 30 , 2014. as a percentage of revenue , ees gross margin increased from 29 % to 30 % . selling , general and administrative . sg & a expense for the fiscal year ended april 30 , 2014 was $ 55.7 million , or 22 % of revenue , compared to sg & a expense of $ 51.5 million , or 21 % of revenue , for the fiscal year ended april 30 , 2013. sg & a expense increased by $ 4.2 million primarily due to impairment costs of tier-ii related assets and higher incentive compensation as a result of achieving certain measures of financial performance . research and development . r & d expense for the fiscal year ended april 30 , 2014 was $ 25.5 million , or 10 % of revenue , compared to r & d expense of $ 37.2 million , or 15 % of revenue , for the fiscal year ended april 30 , 2013. r & d expense decreased primarily due to decreased investments in various technology development initiatives . interest income . interest income for the fiscal year ended april 30 , 2014 was $ 0.9 million , as compared to $ 0.7 million for the fiscal year ended april 30 , 2013. other income . other income for the fiscal year ended april 30 , 2014 was $ 1.6 million , as compared to $ 6.2 million for the fiscal year ended april 30 , 2013. other income primarily represents the change in fair value of the conversion feature of our investment in convertible bonds . income tax expense . our effective income tax expense rate was 7.9 % for the fiscal year ended april 30 , 2014 , as compared to an effective income expense tax rate of 3.2 % for the fiscal year ended april 30 , 2013. the increase in the effective income tax expense rate was primarily due to higher taxable income and lower r & d tax credits . liquidity and capital resources we currently have no material cash commitments , except for normal recurring trade payables , accrued expenses and ongoing research and development costs , all of which we anticipate funding through our existing working capital and funds provided by operating activities . the majority of our purchase obligations are pursuant to funded contractual arrangements with our customers . in addition , we do not currently anticipate significant investment in property , plant and equipment , and we believe that our existing cash , cash equivalents , cash provided by operating activities and other financing sources will be sufficient to meet our anticipated working capital , capital expenditure and debt service requirements , if any , during the next twelve months . there can be no assurance , however , that our business will continue to generate cash flow at current levels . if we are unable to generate sufficient cash flow from operations , then we may be required to sell assets , reduce capital expenditures or obtain additional financing . we anticipate that existing sources of liquidity and cash flows from operations will be sufficient to satisfy our cash needs for the foreseeable future . our primary liquidity needs are for financing working capital , investing in capital expenditures , supporting product development efforts , introducing new products and enhancing existing products , and marketing acceptance and adoption of our products and services . our future capital requirements , to a certain extent , are also subject to general conditions in or affecting the defense and electric vehicle 61 industries and are subject to general economic , political , financial , competitive , legislative and regulatory factors that are beyond our control . moreover , to the extent that existing cash , cash equivalents , cash from operations , and cash from short-term borrowing are insufficient to fund our future activities , we may need to raise additional funds through public or private equity or debt financing . in addition , we may also need to seek additional equity funding or debt financing if we become a party to any agreement or letter of intent for potential investments in , or acquisitions of , businesses , services or technologies . our working capital requirements vary by contract type . on cost-plus-fee programs , we typically bill our incurred costs and fees monthly as work progresses , and therefore working capital investment is minimal . on fixed-price contracts , we typically are paid as we deliver products , and working capital is needed to fund labor and expenses incurred during the lead time from contract award until contract deliveries begin . story_separator_special_tag size= `` 2 `` > revenue from contracts with customers ( topic 606 ) . the new revenue recognition standard provides a five-step analysis of transactions to determine when and how revenue is recognized . the core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services . this asu is effective for annual periods beginning after december 15 , 2017 and shall be applied either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption . we are evaluating the potential impact of this adoption on our consolidated financial statements . in june 2014 , the fasb issued asu no . 2014-12 , compensationstock compensation (

