Stock Compensation - Summary of Activity in Plans (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Shares, Outstanding at beginning of year	948,690
Shares, Granted	1,794
Shares, Exercised	(4,000)
Shares, Forfeited and expired	(284,864)
Shares, Outstanding at end of period	661,620
Shares, Options exercisable at end of period	639,771
Weighted average exercise price, Outstanding at beginning of year	$ 5.44
Weighted average exercise price, Granted	$ 3.52
Weighted average exercise price, Exercised	$ 1.90
Weighted average exercise price, Forfeited and expired	$ 12.38
Weighted average exercise price, Outstanding at end of period	$ 2.47
Weighted average exercise price, Options exercisable at the end of period	$ 2.44
Aggregate intrinsic value, Outstanding at beginning of year
Aggregate intrinsic value, Granted
Aggregate intrinsic value, Exercised
Aggregate intrinsic value, Forfeited and expired
Aggregate intrinsic value, Outstanding at end of period	1,113
Aggregate intrinsic value, Options exercisable at the end of period	$ 1,100