Consolidated Statements of Equity (USD $)	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Treasury Stock	Accumulated Other Comprehensive Income / Loss	Total stockholders' equity
Beginning Balance, amount at Dec. 31, 2009	$ 52,389	$ 141,726,802	$ (27,181,894)	$ (46,916,339)	$ (1,528,044)	$ 66,152,914
Exercise of stock awards	1,758	408,131				409,889
Net effects of tax shortfalls from stock-based award activity		63,682				63,682
Share-based compensation to non-employees		819,185				819,185
Share-based compensation to employees		7,866,384				7,866,384
Net Loss			(35,375,621)			(35,375,621)
Other comprehensive loss					2,430	2,430
Ending Balance, amount at Dec. 31, 2010	54,147	150,884,184	(62,557,515)	(46,916,339)	(1,525,614)	39,938,863
Exercise of stock awards	784	919,322				920,106
Net effects of tax shortfalls from stock-based award activity		0
Share-based compensation to non-employees		24,369				24,369
Share-based compensation to employees		5,493,689				5,493,689
Net Loss			(23,368,283)			(23,368,283)
Other comprehensive loss					(191,806)	(191,806)
Ending Balance, amount at Dec. 31, 2011	54,931	157,321,564	(85,925,798)	(46,916,339)	(1,717,420)	22,816,938
Exercise of stock awards	685	737,500				738,185
Net effects of tax shortfalls from stock-based award activity		0
Share-based compensation to non-employees		27,487				27,487
Share-based compensation to employees		4,587,282				4,587,282
Net Loss			(14,984,321)			(14,984,321)
Other comprehensive loss					67,370	67,370
Ending Balance, amount at Dec. 31, 2012	$ 55,616	$ 162,673,833	$ (100,910,119)	$ (46,916,339)	$ (1,650,050)	$ 13,252,941