Quarterly Results of Operations (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 7,232,135	$ 6,818,777	$ 6,985,909	$ 3,789,766	$ 4,661,579	$ 182,792	$ 182,523	$ 111,722	$ 24,826,587	$ 5,138,616	$ 473,386
Gross profit/(loss)	(1,166,039)	133,900	(1,501,492)	(252,672)	726,435	(17,665)	(13,449)	(40,329)
Loss from operations	(5,086,941)	(4,442,748)	(5,664,953)	(5,738,160)	(5,799,718)	(7,805,878)	(9,053,222)	(7,660,816)	(20,932,802)	(30,319,634)	(15,554,541)
Net Loss	(5,541,404)	(4,518,260)	(5,524,324)	(5,763,032)	(5,455,150)	(8,994,179)	(8,980,346)	(7,332,598)	(21,347,020)	(30,762,273)	(11,606,231)
Net loss available to common shareholders	$ (6,520,944)	$ (5,491,383)	$ (6,554,059)	$ (6,797,339)	$ (6,524,609)	$ (10,086,692)	$ (10,082,744)	$ (8,438,475)	$ (25,363,725)	$ (35,132,520)	$ (16,302,997)
Basic earnings per common share (in usd per share)	$ (0.09)	$ (0.09)	$ (0.11)	$ (0.13)	$ (0.13)	$ (0.24)	$ (0.26)	$ (0.24)	$ (0.42)	$ (0.87)	$ (0.66)
Diluted earnings per common share (in usd per share)	$ (0.09)	$ (0.09)	$ (0.11)	$ (0.13)	$ (0.13)	$ (0.24)	$ (0.26)	$ (0.24)	$ (0.42)	$ (0.87)	$ (0.66)