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Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Taxes Disclosure [Line Items]
Income tax provision	$ 1,140,000	$ 1,077,000	$ 3,270,000	$ 2,575,000
Effective tax rate for continuing operations			24.00%	20.00%
Accounting Standards Update 2016-09 [Member]
Income Taxes Disclosure [Line Items]
Excess tax benefits primarily from stock option exercises			$ 130,000	$ 692,000

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Income taxes disclosure.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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