Consolidated Balance Sheets (unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 4,606,978	$ 3,383,737
Short-term investments	6,726,964	5,120,000
Accounts receivable, net	5,044,682	5,082,360
Income tax receivable	51,070	51,070
Deferred tax assets	83,785	88,910
Prepaid expenses and other current assets	444,440	149,724
Total current assets	16,957,919	13,875,801
Deferred royalty buy-down	2,750,000	2,750,000
Deferred tax assets - long term	1,412,870	1,484,141
Patent costs, net	232,080	280,322
Total assets	21,352,869	18,390,264
Current liabilities:
Accounts payable and accrued expenses	538,870	512,866
Deferred tax liability	60,200	0
Deferred revenue	69,130	133,524
Accrued liabilities of discontinued operations	78,138	78,138
Total current liabilities	746,338	724,528
Long-term deferred revenue	155,543	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 ; 6,635,168 and 6,625,168 shares issued at September 30, 2013 and December 31, 2012, respectively	6,635	6,625
Additional paid-in capital	20,729,345	20,688,706
Retained earnings (deficit)	3,249,216	(310,829)
Treasury stock, 297,200 and 260,632 shares at cost at September 30, 2013 and December 31, 2012, respectively	(3,534,208)	(2,926,156)
Total stockholders' equity	20,450,988	17,458,346
Total liabilities and stockholders' equity	$ 21,352,869	$ 18,390,264