Condensed Consolidated Income Statement (unaudited) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenues:
Royalties	$ 5,594,109us-gaap_RoyaltyRevenue	$ 2,740,318us-gaap_RoyaltyRevenue
Licensing revenues	12,345us-gaap_LicensesRevenue	17,283us-gaap_LicensesRevenue
Total Revenues	5,606,454us-gaap_SalesRevenueNet	2,757,601us-gaap_SalesRevenueNet
Costs and expenses:
Research and development	239,465us-gaap_ResearchAndDevelopmentExpense	382,704us-gaap_ResearchAndDevelopmentExpense
General and administrative	1,803,122us-gaap_GeneralAndAdministrativeExpense	1,246,305us-gaap_GeneralAndAdministrativeExpense
Total Cost and Expenses	2,042,587us-gaap_CostsAndExpenses	1,629,009us-gaap_CostsAndExpenses
Operating income	3,563,867us-gaap_OperatingIncomeLoss	1,128,592us-gaap_OperatingIncomeLoss
Other income:
Interest income	13,720us-gaap_InvestmentIncomeInterest	6,971us-gaap_InvestmentIncomeInterest
Other income	4,633us-gaap_OtherNonoperatingIncomeExpense	4,828us-gaap_OtherNonoperatingIncomeExpense
Total other income	18,353us-gaap_NonoperatingIncomeExpense	11,799us-gaap_NonoperatingIncomeExpense
Income before income tax expense	3,582,220	1,140,391
Income tax expense	(1,251,320)us-gaap_IncomeTaxExpenseBenefit	(386,402)us-gaap_IncomeTaxExpenseBenefit
Net income	$ 2,330,900us-gaap_NetIncomeLoss	$ 753,989us-gaap_NetIncomeLoss
Basic net income per share (in dollars per share)	$ 0.35us-gaap_EarningsPerShareBasic	$ 0.12us-gaap_EarningsPerShareBasic
Diluted net income per share (in dollars per share)	$ 0.32us-gaap_EarningsPerShareDiluted	$ 0.11us-gaap_EarningsPerShareDiluted
Shares used in computation of basic net income per share (in shares)	6,739,047	6,378,859
Shares used in computation of diluted net income per share (in shares)	7,218,033	7,022,172

Total costs of sales and operating expenses for the period.

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