Net Loss Per Share (Computation of Basic and Diluted EPS) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net Loss Per Share [Abstract]
Numerator for basic EPS	$ (4,316,661)	$ (1,915,281)	$ 2,806,427	$ (5,812,912)	$ (5,513,487)	$ (7,273,070)	$ (9,694,685)	$ (9,549,933)	$ (9,238,427)	$ (32,031,175)	$ (19,923,487)
Convertible debentures
Numerator for diluted EPS									$ (9,238,427)	$ (32,031,175)	$ (19,923,487)
Denominator for basic EPS - weighted average shares									6,944,928	5,482,627	5,052,200
Convertible debentures
Denominator for diluted EPS									6,944,928	5,482,627	5,052,200
Basic EPS	$ (0.55)	$ (0.25)	$ 0.42	$ (1.06)	$ (1.00)	$ (1.33)	$ (1.77)	$ (1.75)	$ (1.33)	$ (5.84)	$ (3.94)
Diluted EPS	$ (0.55)	$ (0.25)	$ 0.32	$ (1.06)	$ (1.00)	$ (1.33)	$ (1.77)	$ (1.75)	$ (1.33)	$ (5.84)	$ (3.94)