Stock Incentive Plans - Summary of Non-vested Options (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015
Options
Options, Granted	60,000
Weighted-average exercise price
Weighted-average exercise price, Granted	$ 3.97
Weighted-average exercise price, Forfeited	$ 13.72
Non-vested Options [Member]
Options
Options, Non-vested, Beginning balance	628,733
Options, Granted	60,000
Options, Vested	(31,375)
Options, Forfeited	(27,699)
Options, Non-vested, Ending balance	629,659
Weighted-average exercise price
Weighted-average exercise price, Beginning balance	$ 5.93
Weighted-average exercise price, Granted	$ 3.97
Weighted-average exercise price, Vested	$ 6.81
Weighted-average exercise price, Forfeited	$ 11.40
Weighted-average exercise price, Ending balance	$ 5.46