Stock-Based Compensation (Detail) - Restricted Stock Unit Activity - Restricted Stock	3 Months Ended
	Mar. 31, 2017 $ / shares shares
Shares (in shares)
Beginning balance (in shares) | shares	1,463,796
Granted (in shares) | shares	0
Forfeited (in shares) | shares	(200,000)
Vested (in shares) | shares	(113,332)
Ending balance (in shares) | shares	1,150,464
Weighted Average Grant Date Fair Value (in Dollars per share)
Beginning balance (in dollars per share) | $ / shares	$ 2.82
Granted (in dollars per share) | $ / shares	0.00
Forfeited (in dollars per share) | $ / shares	3.03
Vested (in dollars per share) | $ / shares	4.28
Ending balance (in dollars per share) | $ / shares	$ 2.64