Net (Loss) Income Per Common Share - Calculation of Basic and Diluted (Loss) Income Per Common and Common Equivalent Share (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Basic net (loss) income per share
Net (loss) income	$ (3,154,317)	$ 388,729	$ 744,204	$ 7,285,932
Less: Preferred stock dividends	(6,875)		20,625
Net (loss) income applicable to common stock	(3,147,442)	388,729	723,579	7,285,932
Basic weighted average number of common shares outstanding	11,137,780	10,916,358	10,994,382	10,913,844
Basic net (loss) income per share	$ (0.28)	$ 0.04	$ 0.07	$ 0.67
Diluted net (loss) income per share
Net (loss) income applicable to common stock	(3,147,442)	388,729	723,579	7,285,932
Add: Preferred stock dividends	(6,875)		20,625
Less: Fair value of stock warrants for dilutive warrants				(5,399,569)
Net (loss) income applicable to dilutive common stock	$ (3,154,317)	$ 388,729	$ 744,204	$ 1,886,363
Basic weighted average number of common shares outstanding	11,137,780	10,916,358	10,994,382	10,913,844
Effect of dilutive securities
Dilutive stock awards		9,045	11,443	127
Dilutive preferred share conversions		142,450	142,450	142,450
Weighted average number diluted shares outstanding adjustment		151,495	153,893	142,577
Diluted weighted average number of common shares outstanding	11,137,780	11,067,853	11,148,275	11,056,421
Diluted net (loss) income per share	$ (0.28)	$ 0.04	$ 0.07	$ 0.17