Stockholders' Equity - Summary of Option Activity for Stock Options (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Roll Forward]
Shares, Outstanding, Beginning Balance	747,500
Shares, Granted	0	0
Shares, Exercised	(15,000)		0
Shares, Expired	(125,000)
Shares, Forfeited
Shares, Outstanding, Ending Balance	607,500	747,500
Shares, Exercisable	556,662
Shares, Expected to vest	50,235
Weighted Average Exercise Price, Outstanding, Beginning Balance	$ 12.32
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised	$ 8.38
Weighted Average Exercise Price, Expired	$ 29.52
Weighted Average Exercise Price, Forfeited
Weighted Average Exercise Price, Outstanding, Ending Balance	$ 8.88	$ 12.32
Weighted Average Exercise Price, Exercisable	$ 9.03
Weighted Average Exercise Price, Expected to vest	$ 7.23
Weighted Average Remaining Contractual Life (Yrs.), Outstanding	6 years 15 days	5 years 11 months 1 day
Weighted Average Remaining Contractual Life (Yrs.), Exercisable	5 years 11 months 5 days
Weighted Average Remaining Contractual Life (Yrs.), Expected to vest	7 years 2 months 23 days
Aggregate Intrinsic Value, Exercised	$ 232	$ 245
Aggregate Intrinsic Value, Outstanding	11,567
Aggregate Intrinsic Value, Exercisable	10,520
Aggregate Intrinsic Value, Expected to vest	$ 1,035