Significant Items Making up Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Disclosure Significant Items Making Up Deferred Tax Assets And Liabilities [Abstract]
Allowances not currently deductible for tax purposes	$ 3,481	$ 3,555
Net operating loss carryforwards	62,779	60,774
Accrued and other	8,781	2,759
Deferred Tax Assets, Gross, Total	75,041	67,088
Less valuation allowance	(70,478)	(62,646)
Deferred Tax Assets, Net of Valuation Allowance, Total	4,563	4,442
Depreciation and amortization	(2,774)	(3,525)
Other	(1,789)	(917)
Deferred Tax Liabilities, Gross, Total	$ (4,563)	$ (4,442)