Consolidated Balance Sheet (USD $)	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 9,810,816	$ 5,624,860
Short term investments	10,900,436	6,966,964
Accounts receivable, net	2,987,047	5,004,418
Income tax receivable	653,116	255,708
Deferred tax asset	16,907	94,992
Deferred royalty buy-down	569,641	0
Prepaid expenses and other current assets	210,847	326,519
Total current assets	25,148,810	18,273,461
Long-term Investments	1,250,000	0
Deferred royalty buy-down - long term	3,271,120	3,350,000
Deferred tax assets - long term	1,061,864	1,412,784
Patent costs, net	295,030	215,999
Total assets	31,026,824	23,252,244
Current liabilities:
Accounts payable and accrued expenses	543,696	634,277
Deferred revenue - license fees	49,378	69,130
Accrued liabilities of discontinued operations	78,138	78,138
Total current liabilities	671,212	781,545
Deferred revenue - license fees	98,757	138,260
Stockholders' equity:
Series A Preferred stock, $.50 par value, 700,000 shares authorized; none outstanding	0	0
Common stock, $.001 par value; 10,000,000 shares authorized; 7,062,209 and 6,655,168 shares issued and 6,730,622 and 6,354,429 outstanding at December 31, 2014 and 2013, respectively	7,062	6,655
Additional paid-in capital	25,059,458	20,951,796
Retained earnings	9,620,978	4,975,018
Treasury stock, 331,587 and 300,739 shares at cost as of December 31, 2014 and 2013	(4,430,643)	(3,601,030)
Total stockholders' equity	30,256,855	22,332,439
Total liabilities and stockholders' equity	$ 31,026,824	$ 23,252,244