Shareholders Equity - Summary of Information about Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options outstanding, Number of Shares, Beginning Balance	342,437	214,580
Number of Shares, Granted	12,000	206,600
Number of Shares, Exercised	(4,000)	(4,800)
Number of Shares, Forfeited	(85,000)	(73,943)
Options outstanding, Number of Shares, Ending Balance	265,437	342,437	214,580
Options outstanding, Weighted Average Exercise Price, Beginning Balance	$ 6.09	$ 8.31
Number of Shares, Exercisable	164,277
Weighted Average Exercise Price, Granted	$ 5.11	$ 4.05
Weighted Average Exercise Price, Exercised	$ 4.05	$ 4.51
Weighted Average Exercise Price, Forfeited	$ 5.61	$ 6.97
Options outstanding, Weighted Average Exercise Price, Ending Balance	$ 6.23	$ 6.09	$ 8.31
Options outstanding, Aggregate Intrinsic Value, Beginning Balance	$ 114,125	$ 0
Weighted Average Exercise Price, Exercisable	$ 7.51
Aggregate Intrinsic Value, Granted	0	2,655
Aggregate Intrinsic Value, Exercised	4,080	4,292
Aggregate Intrinsic Value, Forfeited	0	0
Options outstanding, Aggregate Intrinsic Value, Ending Balance	255,121	114,125	0
Aggregate Intrinsic Value, Exercisable	$ 97,074
Weighted Average Remaining Contractual Term, Granted	9 years 7 months 21 days	9 years 2 months 1 day
Weighted Average Remaining Contractual Term, Exercised	8 years 2 months 1 day	7 years 10 months 21 days
Weighted Average Remaining Contractual Term, Forfeited	5 years 10 months 10 days	1 year 7 months 6 days
Options outstanding, Weighted Average Remaining Contractual Term, Balance	5 years 10 months 24 days	6 years 9 months 7 days	3 years 7 months 6 days
Weighted Average Remaining Contractual Term, Exercisable	4 years 5 months 1 day