Earnings Per Common Share (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, 2010		Sep. 30, 2010		Jun. 30, 2010		Mar. 31, 2010		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Net Income (loss)	$ (32,423,775)		$ (29,837,360)		$ (23,106,239)		$ (17,433,529)		$ (1,698,979)		$ (5,872,211)		$ (1,438,278)		$ (5,810,281)		$ 3,032,942		$ 8,226,153		$ 11,011,921		$ 4,573,634		$ (102,800,903)		$ (14,819,749)		$ 26,844,650
Weighted Average Shares - Basic																									16,328,132	[1]	15,655,443	[1]	15,551,108	[1]
Dilutive effect of stock options and restricted stock units																									0		0		53,203
Weighted Average Shares - Diluted [1]																									16,328,132	[1]	15,655,443	[1]	15,604,311	[1]
Basic Earnings Per Share (in dollars per share)	$ (1.92)	[1]	$ (1.77)	[1]	$ (1.46)	[1]	$ (1.11)	[1]	$ (0.11)	[1]	$ (0.37)	[1]	$ (0.09)	[1]	$ (0.37)	[1]	$ 0.19	[1]	$ 0.53	[1]	$ 0.71	[1]	$ 0.29	[1]	$ (6.30)	[1]	$ (0.95)	[1]	$ 1.73	[1]
Diluted Earnings Per Share (in dollars per share)	$ (1.92)	[1]	$ (1.77)	[1]	$ (1.46)	[1]	$ (1.11)	[1]	$ (0.11)	[1]	$ (0.37)	[1]	$ (0.09)	[1]	$ (0.37)	[1]	$ 0.19	[1]	$ 0.53	[1]	$ 0.71	[1]	$ 0.29	[1]	$ (6.30)	[1]	$ (0.95)	[1]	$ 1.72	[1]

[1] Adjusted to give effect to the 1 for 4 reverse stock split that became effective on May 22, 2012, see Note 11.