Stock-Based Compensation (Detail) - Stock Option Activity (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Number of Options (in shares):
Beginning balance	1,914,000
Granted	80,000
Exercised	(6,250)
Expired or forfeited	(67,000)
Ending balance	1,920,750
Exercisable on March 31, 2013 (in shares)	1,910,750
Weighted-Average Exercise Price (in dollars per share):
Beginning balance	$ 11.38
Granted	$ 3.85
Exercised	$ 3.80
Expired or forfeited	$ 6.05
Ending balance	$ 11.27
Exercisable on March 31, 2013 (in Dollars per share)	$ 11.30
Outstanding, Weighted Average Remaining Contractual Term	3 years 8 months 27 days
Exercisable, Weighted Average Remaining Contractual Term	3 years 8 months 19 days
Outstanding, Aggregate Intrinsic Value	$ 163
Exercisable, Aggregate Intrinsic Value	$ 163