Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Deduction percentage of dividends received from distribution to earnings previously taxed	100.00%
Foreign earnings repatriated	$ 57,000,000
Additional income tax expense	$ 500,000
Increase in effective tax rate	0.004
Tax loss carryforwards	$ 12,031,000	$ 14,901,000
Tax credit carryforwards	5,200,000	2,141,000
Capital loss carryforwards	621,000	0
Valuation Allowance	2,994,000	3,701,000
Unrecognized tax benefits	3,273,000	168,000	$ 1,927,000	$ 1,931,000
Unrecognized tax benefits that, if recognized, would impact effective tax rates	3,105,000	162,000	1,917,000
Net interest and penalty expense (income)	19,000	(26,000)	$ 3,000
Income tax liability for interest and penalties	$ 49,000	30,000
Unrecognized tax benefits from adjustments related to examination		1,526,000
Income tax refund receivable		$ 1,326,000