Stock-Based Compensation (Detail) - Stock Option Activity (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Number of Options (in shares):
Beginning balance	1,914,000
Granted	80,000
Exercised	0
Expired or forfeited	(67,000)
Ending balance	1,927,000
Exercisable on March 31, 2013 (in shares)	1,897,000
Weighted-Average Exercise Price (in dollars per share):
Beginning balance	$ 11.38
Granted	$ 3.85
Exercised	$ 0.00
Expired or forfeited	$ 6.05
Ending balance	$ 11.25
Exercisable on March 31, 2013 (in Dollars per share)	$ 11.31
Outstanding, Weighted Average Remaining Contractual Term	4 years
Exercisable, Weighted Average Remaining Contractual Term	4 years
Outstanding, Aggregate Intrinsic Value	$ 17
Exercisable, Aggregate Intrinsic Value	$ 17