Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax [Line Items]
Net operating losses percentage	80.00%
Transition tax unrepatriated earnings foreign subsidiaries payable period	8 years
Income tax expense	$ 19,000,000
Favorable measurement-period adjustment to income tax expense	$ 5,200,000
Measurement-period adjustment reduction of rate	3.70%
Foreign earnings repatriated	$ 100,000,000
Additional income tax expense	$ 1,800,000
Increase in effective tax rate	1.30%
Corporate tax rate	21.00%	35.00%	35.00%
Deferred income tax benefit		$ 4,500,000
Tax cuts and jobs act of 2017 deferred income tax expense benefit	$ 9,700,000
Deduction percent of qualified property	100.00%
Depreciation phased out percentage	20.00%
Estimated expenditure on qualified property	$ 11,500,000
Addition in valuation allowance	0
Income tax expense, current	$ 600,000
Increase in effective tax rate	0.40%
Increase in effective tax rate	0.30%
Tax loss carryforwards	$ 14,901,000	10,352,000
Tax credit carryforwards	2,141,000	1,851,000
Valuation Allowance	3,701,000	2,255,000
Unrecognized tax benefits	168,000	1,927,000	$ 1,931,000	$ 1,958,000
Unrecognized tax benefits that, if recognized, would impact effective tax rates	162,000	1,917,000	1,921,000
Recognition of interest and penalties accrued related to unrecognized tax benefits as income tax expense	26,000	3,000	$ 9,000
Income tax liability for interest and penalties	30,000	56,000
Unrecognized tax benefits from adjustments related to examination	1,526,000
Income tax refund receivable	1,300,000
Executive [Member]
Income Tax [Line Items]
Income tax expense	500,000
Maximum deductible limitation for employee compensation	1,000,000
Deemed Repatriation Transition Tax [Member]
Income Tax [Line Items]
Provisional transition tax obligation	19,000,000	19,400,000
Income tax expense	19,000,000	$ 19,400,000
Favorable measurement-period adjustment transition tax obligation	400,000
Favorable measurement-period adjustment to income tax expense	$ 400,000
Measurement-period adjustment reduction of rate	0.30%
Maximum [Member]
Income Tax [Line Items]
Foreign tax credit percent	50.00%