Stock Based Compensation - Summary of Restricted Stock Award Activity (Detail) (USD $)	1 Months Ended	9 Months Ended	12 Months Ended
	Feb. 28, 2013	Sep. 30, 2013 Restricted Stock [Member]	Dec. 31, 2009 Restricted Stock [Member]
Restricted Stock Award Activity [Abstract]
Beginning Balance		219,989
Non-vested Number of Shares, Granted	81,391	171,819	50,000
Non-vested Number of Shares, Vested		(123,134)
Non-vested Number of Shares, Forfeited		(951)
Ending Balance		267,723
Weighted Average Grant Date Fair Value, Beginning Balance		$ 2.39
Weighted Average Grant Date Fair Value, Granted		$ 3.47
Weighted Average Grant Date Fair Value, Vested		$ 2.91
Weighted Average Grant Date Fair Value, Forfeited		$ 3.09
Weighted Average Grant Date Fair Value, Ending Balance		$ 2.84