Net Loss Per Common Share (Reconciliation of Net Loss Per Share) (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
Numerator:
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)
Preferred stock dividends									(4,016,705)	(4,370,247)	(4,696,766)
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)
Denominator:
Basic weighted average shares outstanding									60,580,742	40,497,098	24,640,774
Effect of dilutive securities									0	0	0
Diluted weighted average shares outstanding									60,580,742	40,497,098	24,640,774
Net loss per common share:
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)