Consolidated Statements Of Stockholders’ Equity (USD $)	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
BALANCE, at Dec. 31, 2010	$ 843	$ (129)	$ 352,297,822	$ (1,165)	$ (343,648,330)	$ 8,649,041
BALANCE, (in Shares) at Dec. 31, 2010	8,430,579	26
Exercise of stock options	5		125,707			125,712
Exercise of stock options (in Shares)	53,751
Purchases under Employee Stock Purchase Plan	1		25,935			25,936
Purchases under Employee Stock Purchase Plan (in Shares)	9,934
Stock-based compensation			312,282			312,282
Unrealized gain on available-for-sale investments				1,946		1,946
Net Income (Loss)					1,553,672	1,553,672
BALANCE, at Dec. 31, 2011	849	(129)	352,761,746	781	(342,094,658)	10,668,589
BALANCE, (in Shares) at Dec. 31, 2011	8,494,264	26
Exercise of stock options	3		49,093			49,096
Exercise of stock options (in Shares)	25,375
Purchases under Employee Stock Purchase Plan	1		25,528			25,529
Purchases under Employee Stock Purchase Plan (in Shares)	8,642
Stock-based compensation			241,150			241,150
Unrealized gain on available-for-sale investments				500		500
Net Income (Loss)					1,525,429	1,525,429
BALANCE, at Dec. 31, 2012	$ 853	$ (129)	$ 353,077,517	$ 1,281	$ (340,569,229)	$ 12,510,293
BALANCE, (in Shares) at Dec. 31, 2012	8,528,281	26