Stock-Based Compensation (Detail) - Stock Option Activity $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Number of Options (in shares):
Beginning balance (in shares)	1,546,500
Granted (in shares)	126,000
Exercised (in shares)	0
Expired or forfeited (in shares)	(270,000)
Ending balance (in shares)	1,402,500
Exercisable (in shares)	1,402,500
Weighted-Average Exercise Price (in dollars per share):
Beginning balance (in dollars per share) | $ / shares	$ 11.62
Granted (in dollars per share) | $ / shares	2.44
Exercised (in dollars per share) | $ / shares	0.00
Expired or forfeited (in dollars per share) | $ / shares	14.84
Ending balance (in dollars per share) | $ / shares	10.17
Exercisable (in dollars per share) | $ / shares	$ 10.17
Outstanding, Weighted Average Remaining Contractual Term (in years)	3 years 10 months 24 days
Exercisable, Weighted Average Remaining Contractual Term (in years)	3 years 10 months 24 days
Outstanding, Aggregate Intrinsic Value | $	$ 0
Exercisable, Aggregate Intrinsic Value | $	$ 0