Condensed Consolidated Income Statement (unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Royalties	$ 6,555,647	$ 5,594,109
Licensing revenues	12,344	12,345
Total Revenues	6,567,991	5,606,454
Costs and expenses:
Research and development	248,500	239,465
General and administrative	2,164,333	1,803,122
Total Cost and Expenses	2,412,833	2,042,587
Operating income	4,155,158	3,563,867
Other income:
Interest income	52,703	13,720
Other income	21,358	4,633
Total other income	74,061	18,353
Income before income tax expense	4,229,219	3,582,220
Provision for income tax expense	(1,400,095)	(1,251,320)
Net income	$ 2,829,124	$ 2,330,900
Basic net income per share (in dollars per share)	$ 0.40	$ 0.35
Diluted net income per share (in dollars per share)	$ 0.39	$ 0.32
Shares used in computation of basic net income per share (in shares)	7,011,664	6,739,047
Shares used in computation of diluted net income per share (in shares)	7,274,966	7,218,033