Income Taxes - Schedule of Net Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Gross deferred tax assets:
Accrued expenses and other	$ 286	$ 3
Reserves on assets	2,000	3,078
Share-based compensation awards	436	1,340
Minimum pension / post retirement	2,318	4,197
Net operating loss carry-forwards	3,471	5,932
Tax credit carry-forwards	1,634	1,634
Valuation allowances	(3,873)	(3,135)
Total Deferred Tax Assets	6,272	13,049
Gross deferred tax liabilities:
Depreciation	(448)	(614)
Goodwill and intangibles	(13,588)	(23,060)
Prepaid expenses and inventory	(585)	(785)
Revenue recognition	(1,861)	(1,554)
Total Deferred Tax Liabilities	(16,482)	(26,013)
Net deferred tax liabilities	$ (10,210)	$ (12,964)