Stock-Based Compensation (Detail) - Stock Option Activity $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares
Number of Options (in shares):
Beginning balance (in shares) | shares	1,191,125
Granted (in shares) | shares	81,000
Exercised (in shares) | shares	0
Expired or forfeited (in shares) | shares	(200,375)
Ending balance (in shares) | shares	1,071,750
Exercisable (in shares) | shares	1,071,750
Weighted-Average Exercise Price (in dollars per share):
Beginning balance (in dollars per share) | $ / shares	$ 10.48
Granted (in dollars per share) | $ / shares	1.58
Exercised (in dollars per share) | $ / shares	0.00
Expired or forfeited (in dollars per share) | $ / shares	16.39
Ending balance (in dollars per share) | $ / shares	8.70
Exercisable (in dollars per share) | $ / shares	$ 8.70
Outstanding, Weighted Average Remaining Contractual Term (in years)	4 years 8 months 10 days
Exercisable, Weighted Average Remaining Contractual Term (in years)	4 years 8 months 10 days
Outstanding, Aggregate Intrinsic Value | $	$ 0
Exercisable, Aggregate Intrinsic Value | $	$ 0