Consolidated Balance Sheets (unaudited) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 8,840,706	$ 5,624,860
Short-term investments	7,793,002	6,966,964
Accounts receivable, net	2,042,617	5,004,418
Income tax receivable	1,272,486	255,708
Deferred tax assets	99,244	94,992
Prepaid expenses and other current assets	291,441	326,519
Total current assets	20,339,496	18,273,461
Deferred royalty buy-down	3,309,146	3,350,000
Deferred tax assets - long term	1,377,790	1,412,784
Patent costs, net	299,711	215,999
Total assets	25,326,143	23,252,244
Current liabilities:
Accounts payable and accrued expenses	719,194	634,277
Deferred revenue	69,130	69,130
Accrued liabilities of discontinued operations	78,138	78,138
Total current liabilities	866,462	781,545
Long-term deferred revenue	103,695	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 ; 6,806,467 and 6,655,168 shares issued at June 30, 2014 and December 31, 2013, respectively	6,806	6,655
Additional paid-in capital	22,393,836	20,951,796
Retained earnings	6,306,973	4,975,018
Treasury stock, 329,455 and 300,739 shares at cost at June 30, 2014 and December 31, 2013, respectively	(4,351,629)	(3,601,030)
Total stockholders' equity	24,355,986	22,332,439
Total liabilities and stockholders' equity	$ 25,326,143	$ 23,252,244