Earnings Per Share (Details 2)			1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	May 31, 2011 Warrants issued in May, 2011	Sep. 30, 2014 Warrants issued in May, 2011	Feb. 28, 2013 Warrants issued in February, 2013	Sep. 30, 2014 Warrants issued in February, 2013	Jan. 31, 2014 Warrants issued in January, 2014	Sep. 30, 2014 Warrants issued in January, 2014	Sep. 30, 2014 Series C redeemable convertible preferred stock	May 31, 2013 Series C redeemable convertible preferred stock
Dilutive potential common shares
Stock options outstanding	7,267,404	4,145,689
Restricted stock outstanding	433,336
Common stock warrants (1)	4,219,442	27,636,465
Preferred stock (2)	5,554,594	10,972,859								10,431
Number of dilutive potential common shares	17,474,776	42,755,013
Earnings Per Share
Number of warrants issued (in shares)			7,128,563		23,637,500		4,000,000
Antidilutive shares excluded from calculation of diluted earnings per share			22,995,365
Number of warrants exercised (in shares)				22,776,023		23,637,400		0
Preferred stock (2)	5,554,594	10,972,859								10,431
Number of preferred shares that had been converted to common stock									5,200