the patent license agreement provides lg display a non-exclusive , royalty bearing portfolio license to make and sell oled displays under the company 's patent portfolio . the patent license calls for license fees , prepaid royalties and running royalties on licensed products . the agreements include customary provisions relating to warranties , indemnities , confidentiality , assignability and business terms . the agreements provide for certain other minimum obligations relating to the volume of materials sales anticipated over the life of the agreements as well 31 as minimum royalty revenue to be generated under the patent license agreement . the company expects to generate revenue under these agreements that are predominantly tied to lg display 's sales of oled licensed products . the oled commercial supply agreement provides for the sales of materials for use by lg display , which may include phosphorescent dopants and host materials . technology development and support revenue is revenue earned from government contracts , development and technology evaluation agreements and commercialization assistance fees , which includes reimbursements by government entities for all or a portion of the research and development costs we incur in relation to our government contracts . revenues are recognized proportionally as research and development costs are incurred , or as defined milestones are achieved . while we have made significant progress over the past few years developing and commercializing our family of oled technologies ( including our pholed , toled , foled technologies ) and materials , and have generated net income over the past three years , we incurred significant losses prior to this period , resulting in an accumulated deficit of $ 73.6 million as of december 31 , 2015 . we anticipate fluctuations in our annual and quarterly results of operations due to uncertainty regarding , among other factors : the timing , cost and volume of sales of our oled materials ; the timing of our receipt of license fees and royalties , as well as fees for future technology development and evaluation ; the timing and magnitude of expenditures we may incur in connection with our ongoing research and development and patent-related activities ; and the timing and financial consequences of our formation of new business relationships and alliances . critical accounting policies and estimates the discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements , which have been prepared in accordance with u.s. generally accepted accounting principles . the preparation of these financial statements requires us to make estimates and judgments that affect our reported assets and liabilities , revenues and expenses , and other financial information . actual results may differ significantly from our estimates under other assumptions and conditions . we believe that our accounting policies related to revenue recognition and deferred revenue , inventories , the valuation and recoverability of acquired technology , stock-based compensation , income taxes and our supplemental executive retirement plan , as described below , are our “ critical accounting policies ” as contemplated by the sec . these policies , which have been reviewed with our audit committee , are discussed in greater detail below . revenue recognition and deferred revenue material sales relate to the company 's sale of its oled materials for incorporation into its customers ' commercial oled products or for their oled development and evaluation activities . material sales are recognized at the time of shipment or at time or delivery , and the passage of title , depending upon the contractual agreement between the parties . we receive non-refundable advance license and royalty payments under certain commercial , development and technology evaluation agreements with our customers . these payments may include royalty and license fees made pursuant to license agreements and certain material supply agreements . amounts received are deferred and classified as either current or non-current deferred revenue based upon current contractual remaining terms ; however , based upon on-going relationships with customers , as well as future agreement extensions and other factors , amounts classified as current may not be recognized as revenue over the next twelve months . the company evaluates these agreements quarterly , and if it is determined that there is no appreciable likelihood of executing a commercial license agreement with the customer or if a customer terminates the relationship prior to the expiration of its term , the previous deferred amount will recognized as revenue in the corresponding period . for arrangements with extended payment terms where the fee is not fixed and determinable , we recognize revenue when the payment is due and payable . royalty revenue and license fee revenue included as part of commercial supply agreements are recognized when earned and the amount is fixed and determinable . if we used different estimates for the useful life of the licensed technology , or if fees are fixed and determinable , reported revenue during the relevant period would differ . technology development and support revenue is revenue earned from government contracts , development and technology evaluation agreements and commercialization assistance fees , which includes reimbursements by the u.s. government for all or a portion of the research and development expenses we incur related to our government contracts . revenue is recognized proportionally as research and development expenses are incurred or as defined milestones are achieved . in order to ascertain the revenue associated with these contracts for a period , we estimate the proportion of related research and development expenses incurred and whether defined milestones have been achieved . different estimates would result in different revenues for the period . 32 the company records taxes billed to customers and remitted to various governmental entities on a gross basis in both revenues and cost of material sales in the consolidated statements of income . story_separator_special_tag the increase in operating income was due to : an increase in revenue of $ 44.4 million , which includes increases in both material sales and royalty and license fees , partially offset by a $ 3.0 million dollar decrease in technology development and support revenue ; offset by an increase in operating expenses of $ 24.0 million , which includes a $ 12.4 million increase in the cost of material sales , a $ 3.4 million increase in selling , general and administrative expenses and a $ 6.9 million increase in research and development expenses , all of which are described below . we had net income of $ 41.9 million ( or $ 0.90 per basic and diluted share ) for the year ended december 31 , 2014 , compared to net income of $ 74.1 million ( or $ 1.61 per basic and diluted share ) for the year ended december 31 , 2013 . the decrease in net income was primarily due to : recording income tax expense of $ 17.5 million in 2014 compared to the recognition of a tax benefit of $ 35.0 million in 2013 , resulting from the release of income tax valuation allowances ; offset by an increase in operating income of $ 20.4 million . we had adjusted net income of $ 32.6 million ( or $ 0.71 per adjusted basic share and $ 0.70 per adjusted diluted share ) for the year ended december 31 , 2013. this non-gaap measure excludes the effect of the tax valuation allowance releases described above . see the discussion of non-gaap measures in item 6 ( selected financial data ) of this report . revenue the following table details our revenues for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_14_th total revenue for the year ended december 31 , 2014 increased by $ 44.4 million compared to the year ended december 31 , 2013 . the increase in our revenue was primarily the result of increased materials sales and royalty and license fees . 37 material sales the following table details our revenues derived from material sales for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_15_th commercial material sales for the year ended december 31 , 2014 increased by $ 29.4 million compared to the year ended december 31 , 2013 , primarily reflecting increased commercial chemical sales resulting from the adoption of our technology and materials in the marketplace by display manufacturers . developmental material sales for the year ended december 31 , 2014 increased by $ 1.8 million compared to the year ended december 31 , 2013 , primarily reflecting increased number of grams sold of development materials for our customer 's evaluation , manufacture , and development activities . this increase was offset , to some extent , by a change in sales mix from development to commercial . material sales included sales of both phosphorescent emitter and host materials . material sales were comprised of the following for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_16_th phosphorescent emitter sales for the year ended december 31 , 2014 increased by $ 24.0 million compared to the year ended december 31 , 2013 . the increase in our phosphorescent emitter sales was primarily due to an increase in commercial phosphorescent emitter sales and developmental phosphorescent emitter sales . host material sales for the year ended december 31 , 2014 increased by $ 7.2 million compared to the year ended december 31 , 2013 . the increase in our host material sales was primarily due to an increase in the number of grams sold as well as the collection of pass through tax settlements of $ 3.9 million with a japanese customer related to certain host sales in japan . these increases were offset by a decrease in the average price per gram sold . our customers are not required to purchase our host materials in order to utilize our phosphorescent emitter materials and the host materials business is more competitive than the phosphorescent material sales business . royalty and license fees royalty and license fees were as follows for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_17_th royalty and license fees for the year ended december 31 , 2014 increased by $ 16.2 million compared to the year ended december 31 , 2013 . this increase reflects the receipt and therefore recognition of $ 50.0 million of license fee payments under our patent and license agreement with sdc , compared to $ 40.0 million in the prior period . the increase was also related to an increase in license fees attributable to material sales to certain customers . 38 technology development and support revenue technology development and support revenue were as follows for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_18_th technology development and support revenue is revenue earned from government contracts , development and technology evaluation agreements and commercialization assistance fees , which includes reimbursements by the u.s. government for all or a portion of the research and development expenses we incur related to our government contracts . technology development and support revenue for the year ended december 31 , 2014 decreased by $ 3.0 million compared to year ended december 31 , 2013 . the decrease is primarily related to the smaller number of government contracts and due to the timing of revenue recognition for certain customers . cost of material sales cost of commercial material sales were as follows for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_19_th cost of commercial material sales for the year ended december 31 , 2014 increased 12.4 million from the year ended december 31 , 2013 . the increase in our cost of commercial

liquidity and capital resources our principle sources of liquidity are our cash and cash equivalents and our short-term investments . as of december 31 , 2015 , we had cash and cash equivalents of $ 97.5 million and short-term investments of $ 298.0 million , for a total of $ 395.5 million . this compares to cash and cash equivalents of $ 45.4 million and short-term investments of $ 243.1 million , for a total of $ 288.5 million , as of december 31 , 2014 providing for a total liquidity increase of $ 107.0 million . the increase in cash and cash equivalents of $ 52.1 million was primarily due to cash provided by operating activities , partially offset by cash used in investing activities and financing activities . cash provided by operating activities was $ 113.6 million for the year ended december 31 , 2015 , compared to $ 47.3 million for the year ended december 31 , 2014 . the increase in cash provided by operating activities was primarily due to the following : the receipt of $ 48.8 million from customers for prepaid royalty and license fees recognized as deferred revenue ; and the impact of the timing of net inventory purchases of $ 21.8 million . cash used in investing activities was $ 58.6 million for the year ended december 31 , 2015 , compared to $ 42.3 million for the year ended december 31 , 2014 . the increase in cash used in investing activities was mainly due to the timing of maturities and purchases of investments resulting in net purchases of $ 53.5 million for the year ended december 31 , 2015 , compared to net purchases of $ 36.2 million for the year ended december 31 , 2014 .


 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 our principle sources of liquidity are our cash and cash equivalents and our short-term investments . as of december 31 , 2015 , we had cash and cash equivalents of $ 97.5 million and short-term investments of $ 298.0 million , for a total of $ 395.5 million . this compares to cash and cash equivalents of $ 45.4 million and short-term investments of $ 243.1 million , for a total of $ 288.5 million , as of december 31 , 2014 providing for a total liquidity increase of $ 107.0 million . the increase in cash and cash equivalents of $ 52.1 million was primarily due to cash provided by operating activities , partially offset by cash used in investing activities and financing activities . cash provided by operating activities was $ 113.6 million for the year ended december 31 , 2015 , compared to $ 47.3 million for the year ended december 31 , 2014 . the increase in cash provided by operating activities was primarily due to the following : the receipt of $ 48.8 million from customers for prepaid royalty and license fees recognized as deferred revenue ; and the impact of the timing of net inventory purchases of $ 21.8 million . cash used in investing activities was $ 58.6 million for the year ended december 31 , 2015 , compared to $ 42.3 million for the year ended december 31 , 2014 . the increase in cash used in investing activities was mainly due to the timing of maturities and purchases of investments resulting in net purchases of $ 53.5 million for the year ended december 31 , 2015 , compared to net purchases of $ 36.2 million for the year ended december 31 , 2014 .
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 Suspicious Activity Report : the patent license agreement provides lg display a non-exclusive , royalty bearing portfolio license to make and sell oled displays under the company 's patent portfolio . the patent license calls for license fees , prepaid royalties and running royalties on licensed products . the agreements include customary provisions relating to warranties , indemnities , confidentiality , assignability and business terms . the agreements provide for certain other minimum obligations relating to the volume of materials sales anticipated over the life of the agreements as well 31 as minimum royalty revenue to be generated under the patent license agreement . the company expects to generate revenue under these agreements that are predominantly tied to lg display 's sales of oled licensed products . the oled commercial supply agreement provides for the sales of materials for use by lg display , which may include phosphorescent dopants and host materials . technology development and support revenue is revenue earned from government contracts , development and technology evaluation agreements and commercialization assistance fees , which includes reimbursements by government entities for all or a portion of the research and development costs we incur in relation to our government contracts . revenues are recognized proportionally as research and development costs are incurred , or as defined milestones are achieved . while we have made significant progress over the past few years developing and commercializing our family of oled technologies ( including our pholed , toled , foled technologies ) and materials , and have generated net income over the past three years , we incurred significant losses prior to this period , resulting in an accumulated deficit of $ 73.6 million as of december 31 , 2015 . we anticipate fluctuations in our annual and quarterly results of operations due to uncertainty regarding , among other factors : the timing , cost and volume of sales of our oled materials ; the timing of our receipt of license fees and royalties , as well as fees for future technology development and evaluation ; the timing and magnitude of expenditures we may incur in connection with our ongoing research and development and patent-related activities ; and the timing and financial consequences of our formation of new business relationships and alliances . critical accounting policies and estimates the discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements , which have been prepared in accordance with u.s. generally accepted accounting principles . the preparation of these financial statements requires us to make estimates and judgments that affect our reported assets and liabilities , revenues and expenses , and other financial information . actual results may differ significantly from our estimates under other assumptions and conditions . we believe that our accounting policies related to revenue recognition and deferred revenue , inventories , the valuation and recoverability of acquired technology , stock-based compensation , income taxes and our supplemental executive retirement plan , as described below , are our “ critical accounting policies ” as contemplated by the sec . these policies , which have been reviewed with our audit committee , are discussed in greater detail below . revenue recognition and deferred revenue material sales relate to the company 's sale of its oled materials for incorporation into its customers ' commercial oled products or for their oled development and evaluation activities . material sales are recognized at the time of shipment or at time or delivery , and the passage of title , depending upon the contractual agreement between the parties . we receive non-refundable advance license and royalty payments under certain commercial , development and technology evaluation agreements with our customers . these payments may include royalty and license fees made pursuant to license agreements and certain material supply agreements . amounts received are deferred and classified as either current or non-current deferred revenue based upon current contractual remaining terms ; however , based upon on-going relationships with customers , as well as future agreement extensions and other factors , amounts classified as current may not be recognized as revenue over the next twelve months . the company evaluates these agreements quarterly , and if it is determined that there is no appreciable likelihood of executing a commercial license agreement with the customer or if a customer terminates the relationship prior to the expiration of its term , the previous deferred amount will recognized as revenue in the corresponding period . for arrangements with extended payment terms where the fee is not fixed and determinable , we recognize revenue when the payment is due and payable . royalty revenue and license fee revenue included as part of commercial supply agreements are recognized when earned and the amount is fixed and determinable . if we used different estimates for the useful life of the licensed technology , or if fees are fixed and determinable , reported revenue during the relevant period would differ . technology development and support revenue is revenue earned from government contracts , development and technology evaluation agreements and commercialization assistance fees , which includes reimbursements by the u.s. government for all or a portion of the research and development expenses we incur related to our government contracts . revenue is recognized proportionally as research and development expenses are incurred or as defined milestones are achieved . in order to ascertain the revenue associated with these contracts for a period , we estimate the proportion of related research and development expenses incurred and whether defined milestones have been achieved . different estimates would result in different revenues for the period . 32 the company records taxes billed to customers and remitted to various governmental entities on a gross basis in both revenues and cost of material sales in the consolidated statements of income . story_separator_special_tag the increase in operating income was due to : an increase in revenue of $ 44.4 million , which includes increases in both material sales and royalty and license fees , partially offset by a $ 3.0 million dollar decrease in technology development and support revenue ; offset by an increase in operating expenses of $ 24.0 million , which includes a $ 12.4 million increase in the cost of material sales , a $ 3.4 million increase in selling , general and administrative expenses and a $ 6.9 million increase in research and development expenses , all of which are described below . we had net income of $ 41.9 million ( or $ 0.90 per basic and diluted share ) for the year ended december 31 , 2014 , compared to net income of $ 74.1 million ( or $ 1.61 per basic and diluted share ) for the year ended december 31 , 2013 . the decrease in net income was primarily due to : recording income tax expense of $ 17.5 million in 2014 compared to the recognition of a tax benefit of $ 35.0 million in 2013 , resulting from the release of income tax valuation allowances ; offset by an increase in operating income of $ 20.4 million . we had adjusted net income of $ 32.6 million ( or $ 0.71 per adjusted basic share and $ 0.70 per adjusted diluted share ) for the year ended december 31 , 2013. this non-gaap measure excludes the effect of the tax valuation allowance releases described above . see the discussion of non-gaap measures in item 6 ( selected financial data ) of this report . revenue the following table details our revenues for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_14_th total revenue for the year ended december 31 , 2014 increased by $ 44.4 million compared to the year ended december 31 , 2013 . the increase in our revenue was primarily the result of increased materials sales and royalty and license fees . 37 material sales the following table details our revenues derived from material sales for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_15_th commercial material sales for the year ended december 31 , 2014 increased by $ 29.4 million compared to the year ended december 31 , 2013 , primarily reflecting increased commercial chemical sales resulting from the adoption of our technology and materials in the marketplace by display manufacturers . developmental material sales for the year ended december 31 , 2014 increased by $ 1.8 million compared to the year ended december 31 , 2013 , primarily reflecting increased number of grams sold of development materials for our customer 's evaluation , manufacture , and development activities . this increase was offset , to some extent , by a change in sales mix from development to commercial . material sales included sales of both phosphorescent emitter and host materials . material sales were comprised of the following for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_16_th phosphorescent emitter sales for the year ended december 31 , 2014 increased by $ 24.0 million compared to the year ended december 31 , 2013 . the increase in our phosphorescent emitter sales was primarily due to an increase in commercial phosphorescent emitter sales and developmental phosphorescent emitter sales . host material sales for the year ended december 31 , 2014 increased by $ 7.2 million compared to the year ended december 31 , 2013 . the increase in our host material sales was primarily due to an increase in the number of grams sold as well as the collection of pass through tax settlements of $ 3.9 million with a japanese customer related to certain host sales in japan . these increases were offset by a decrease in the average price per gram sold . our customers are not required to purchase our host materials in order to utilize our phosphorescent emitter materials and the host materials business is more competitive than the phosphorescent material sales business . royalty and license fees royalty and license fees were as follows for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_17_th royalty and license fees for the year ended december 31 , 2014 increased by $ 16.2 million compared to the year ended december 31 , 2013 . this increase reflects the receipt and therefore recognition of $ 50.0 million of license fee payments under our patent and license agreement with sdc , compared to $ 40.0 million in the prior period . the increase was also related to an increase in license fees attributable to material sales to certain customers . 38 technology development and support revenue technology development and support revenue were as follows for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_18_th technology development and support revenue is revenue earned from government contracts , development and technology evaluation agreements and commercialization assistance fees , which includes reimbursements by the u.s. government for all or a portion of the research and development expenses we incur related to our government contracts . technology development and support revenue for the year ended december 31 , 2014 decreased by $ 3.0 million compared to year ended december 31 , 2013 . the decrease is primarily related to the smaller number of government contracts and due to the timing of revenue recognition for certain customers . cost of material sales cost of commercial material sales were as follows for the years ended december 31 , 2014 and 2013 ( amounts in thousands ) : replace_table_token_19_th cost of commercial material sales for the year ended december 31 , 2014 increased 12.4 million from the year ended december 31 , 2013 . the increase in our cost of commercial

