Consolidated Balance Sheets (unaudited) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 7,248,418	$ 3,383,737
Short-term investments	4,962,964	5,120,000
Accounts receivable, net	2,910,146	5,082,360
Income tax receivable	51,070	51,070
Deferred tax assets	70,079	88,910
Prepaid expenses and other current assets	363,854	149,724
Total current assets	15,606,531	13,875,801
Deferred royalty buy-down	2,750,000	2,750,000
Deferred tax assets - long term	1,484,141	1,484,141
Patent costs, net	264,241	280,322
Total assets	20,104,913	18,390,264
Current liabilities:
Accounts payable and accrued expenses	765,936	512,866
Deferred tax liability	332,924	0
Deferred revenue	105,926	133,524
Accrued liabilities of discontinued operations	78,138	78,138
Total current liabilities	1,282,924	724,528
Long-term deferred revenue	190,108	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 March 31, 2013 and December 31, 2012, respectively	6,625	6,625
Additional paid-in capital	20,715,106	20,688,706
Retained earnings (deficit)	1,042,255	(310,829)
Treasury stock, 273,724 and 260,632 shares at cost at March 31, 2013 and December 31, 2012, respectively	(3,132,105)	(2,926,156)
Total stockholders' equity	18,631,881	17,458,346
Total liabilities and stockholders' equity	$ 20,104,913	$ 18,390,264