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Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Product revenue	$ 15,514,682us-gaap_SalesRevenueGoodsNet	$ 14,351,405us-gaap_SalesRevenueGoodsNet
Licensing, milestone and contract revenue	5,642us-gaap_SalesRevenueServicesNet	19,658,882us-gaap_SalesRevenueServicesNet
Total revenue	15,520,324us-gaap_SalesRevenueNet	34,010,287us-gaap_SalesRevenueNet
Operating expenses:
Cost of product revenue	4,313,440us-gaap_CostOfGoodsSold	4,361,019us-gaap_CostOfGoodsSold
Research & development	2,097,762us-gaap_ResearchAndDevelopmentExpense	2,287,715us-gaap_ResearchAndDevelopmentExpense
Selling, general & administrative	3,604,661us-gaap_SellingGeneralAndAdministrativeExpense	3,490,985us-gaap_SellingGeneralAndAdministrativeExpense
Total operating expenses	10,015,863us-gaap_CostsAndExpenses	10,139,719us-gaap_CostsAndExpenses
Income from operations	5,504,461us-gaap_OperatingIncomeLoss	23,870,568us-gaap_OperatingIncomeLoss
Interest income, net	23,723us-gaap_InterestIncomeExpenseNonoperatingNet	467us-gaap_InterestIncomeExpenseNonoperatingNet
Income before income taxes	5,528,184us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	23,871,035us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Provision for income taxes	2,012,627us-gaap_IncomeTaxExpenseBenefit	8,840,782us-gaap_IncomeTaxExpenseBenefit
Net income	3,515,557us-gaap_NetIncomeLoss	15,030,253us-gaap_NetIncomeLoss
Other comprehensive income:
Foreign currency translation adjustment	(2,249,128)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	(26,116)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Basic net income per share:
Net income (in Dollars per share)	$ 0.24us-gaap_EarningsPerShareBasic	$ 1.04us-gaap_EarningsPerShareBasic
Basic weighted average common shares outstanding (in Shares)	14,905,322us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	14,461,367us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted net income per share:
Net income (in Dollars per share)	$ 0.23us-gaap_EarningsPerShareDiluted	$ 0.97us-gaap_EarningsPerShareDiluted
Diluted weighted average common shares outstanding (in Shares)	15,330,054us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	15,499,447us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Net income	3,515,557us-gaap_NetIncomeLoss	15,030,253us-gaap_NetIncomeLoss
Other comprehensive income:
Foreign currency translation adjustment	(2,249,128)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	(26,116)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Comprehensive income	$ 1,266,429us-gaap_ComprehensiveIncomeNetOfTax	$ 15,004,137us-gaap_ComprehensiveIncomeNetOfTax

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