CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2009	$ 15,657	$ 227,535,473	$ (196,924,209)	$ (2,279,238)	$ 28,347,683
Balance (in shares) at Dec. 31, 2009	15,656,745
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock options/warrants for compensation and services	0	1,620,088	0	0	1,620,088
Common stock issued for services	7	44,493	0	0	44,500
Common stock issued for services (in shares)	7,143
Options and warrants exercised	36	147,208	0	0	147,244
Options and warrants exercised (in shares)	35,947
Net income (loss)	0	0	408,460	0	408,460
Balance at Dec. 31, 2010	15,700	229,347,262	(196,515,749)	(2,279,238)	30,567,975
Balance (in shares) at Dec. 31, 2010	15,699,835
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock options/warrants for compensation and services	0	1,387,701	0	0	1,387,701
Options and warrants exercised	3	(3)			0
Options and warrants exercised (in shares)	2,492
Common stock and warrants issued in connection with a public offering	5,600	6,717,339	0	0	6,722,939
Common stock and warrants issued in connection with a public offering (in shares)	5,600,000
Net income (loss)	0	0	(14,424,545)	0	(14,424,545)
Balance at Dec. 31, 2011	21,303	237,452,299	(210,940,294)	(2,279,238)	24,254,070
Balance (in shares) at Dec. 31, 2011	21,302,327				21,302,327
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock options/warrants for compensation and services	0	2,391,018	0	0	2,391,018
Options and warrants exercised	5	7,195	0	0	7,200
Options and warrants exercised (in shares)	5,589
Common stock and warrants issued in connection with a public offering	9,200	21,467,615	0	0	21,476,815
Common stock and warrants issued in connection with a public offering (in shares)	9,200,000
Issuance of restricted stock for compensation	100	511	0	0	611
Issuance of restricted stock for compensation (in shares)	100,000
Net income (loss)	0	0	(17,963,873)	0	(17,963,873)
Balance at Dec. 31, 2012	$ 30,608	$ 261,318,638	$ (228,904,167)	$ (2,279,238)	$ 30,165,841
Balance (in shares) at Dec. 31, 2012	30,607,916				30,607,916