Consolidated Statements of Stockholders' Equity (USD $)	Total	Common stock	Additional paid-in capital	Accumulated deficit	Treasury stock	Accumulated other comprehensive income	Stockholders' equity
Beginning Balance, amount at Dec. 31, 2010		$ 54,147	$ 150,884,184	$ (62,557,515)		$ (1,525,614)
Exercise of stock awards		784	919,322
Accretion of Series A redeemable convertible preferred stock	0
Dividends on Series A redeemable convertible preferred stock	0
Share-based compensation to non-employees			24,369
Share-based compensation to employees			5,493,689
Net loss	(23,368,283)			(23,368,283)
Other comprehensive (loss) income, net						(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
Accretion of Series A redeemable convertible preferred stock	0
Dividends on Series A redeemable convertible preferred stock	0
Share-based compensation to non-employees			27,487
Share-based compensation to employees			4,587,282
Net loss	(14,984,321)			(14,984,321)
Other comprehensive (loss) income, net						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
Exercise of stock awards		421	697,081
Beneficial conversion feature			1,951,266
Accretion of Series A redeemable convertible preferred stock	(127,504)		(127,504)
Dividends on Series A redeemable convertible preferred stock	(216,379)		(216,379)
Share-based compensation to non-employees			37,379
Share-based compensation to employees			1,668,050
Net loss	(10,932,590)			(10,932,590)
Other comprehensive (loss) income, net						(112,337)
Ending Balance, amount at Dec. 31, 2013		$ 56,037	$ 166,683,726	$ (111,842,709)	$ (46,916,339)	$ (1,762,387)	$ 6,218,328