Income Taxes - Statutory Federal Tax Rate of Income (Loss) from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income tax at statutory rate, Amount	$ 1,570	$ 628	$ 404
Add (deduct), Amount
State income taxes, net of federal tax benefit, Amount	243	174	435
Tax rate difference on foreign income taxes, Amount	47	188	222
Tax rate change on deferred tax attributes, Amount	(169)
Non-deductible items, Amount	98	160	(243)
Net decrease in deferred tax attributes, Amount	4,370	516	319
Decrease in valuation allowance against certain deferred tax assets, Amount	(36,226)	(1,323)	(324)
Unrecognized tax benefits, Amount	(28)	17	78
Other, net, Amount	6	41	(48)
Income tax provision	$ (30,089)	$ 401	$ 843
Income tax at statutory rate	34.00%	34.00%	34.00%
Add (deduct), Rate:
State income taxes, net of federal tax benefit, Rate	5.20%	9.40%	36.60%
Tax rate difference on foreign income taxes, Rate	1.00%	10.10%	18.70%
Tax rate change on deferred tax attributes, Rate	(3.60%)
Non-deductible items, Rate	2.10%	8.60%	(20.40%)
Net decrease in deferred tax attributes, Rate	94.60%	27.90%	26.90%
Decrease in valuation allowance against certain deferred tax assets, Rate	(784.30%)	(71.60%)	(27.30%)
Unrecognized tax benefits, Rate	(0.60%)	0.90%	6.60%
Other, net, Rate	0.10%	2.40%	(4.10%)
Income (loss) from continuing operations	(651.50%)	21.70%	71.00%