Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax [Line Items]
Transition tax unrepatriated earnings foreign subsidiaries payable period		8 years
Net operating losses percentage		80.00%
Corporate tax rate		35.00%	35.00%	35.00%
Deferred tax assets		$ 31,800,000
Deferred tax liabilities		36,300,000
Deferred income tax benefit		4,500,000
Provisional transition tax obligation		19,400,000
Deferred tax liabilities noncurrent tax payable		18,100,000
Deferred tax liabilities current tax payable		1,300,000
Change in valuation allowance		0
Income tax expense		19,400,000
Tax loss carryforwards		10,352,000	$ 4,655,000
Tax credit carryforwards		1,851,000	1,599,000
Valuation Allowance		2,255,000	1,815,000
Unrecognized tax benefits		1,927,000	1,931,000	$ 1,958,000	$ 464,000
Unrecognized tax benefits that, if recognized, would impact effective tax rates		1,917,000	1,921,000	1,948,000
Recognition of interest and penalties accrued related to unrecognized tax benefits as income tax expense		3,000	9,000	$ 6,000
Income tax liability for interest and penalties		56,000	$ 53,000
Income tax return adjustments		0
Executive [Member]
Income Tax [Line Items]
Maximum deductible limitation for employee compensation		$ 1,000,000
Scenario Forecast [Member]
Income Tax [Line Items]
Corporate tax rate	21.00%
Maximum [Member]
Income Tax [Line Items]
Foreign tax credit percent		50.00%
Unrecognized tax benefits related to its current uncertain tax positions		$ 1,780,000