Consolidated Balance Sheets (unaudited) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 4,017,531	$ 3,383,737
Short-term investments	7,966,964	5,120,000
Accounts receivable, net	3,903,942	5,082,360
Income tax receivable	51,070	51,070
Deferred tax assets	79,482	88,910
Prepaid expenses and other current assets	411,110	149,724
Total current assets	16,430,099	13,875,801
Deferred royalty buy-down	2,750,000	2,750,000
Deferred tax assets - long term	1,492,509	1,484,141
Patent costs, net	248,160	280,322
Total assets	20,920,768	18,390,264
Current liabilities:
Accounts payable and accrued expenses	660,560	512,866
Deferred tax liability	382,704	0
Deferred revenue	78,328	133,524
Accrued liabilities of discontinued operations	78,138	78,138
Total current liabilities	1,199,730	724,528
Long-term deferred revenue	172,825	207,390
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 ; 6,625,168 shares issued at June 30, 2013 and December 31, 2012, respectively	6,625	6,625
Additional paid-in capital	20,794,154	20,688,706
Retained earnings (deficit)	2,070,441	(310,829)
Treasury stock, 285,352 and 260,632 shares at cost at June 30, 2013 and December 31, 2012, respectively	(3,323,007)	(2,926,156)
Total stockholders' equity	19,548,213	17,458,346
Total liabilities and stockholders' equity	$ 20,920,768	$ 18,390,264