Income Taxes - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Tax [Line Items]
Effective income tax rate	24.80%	24.20%
Net balance of deferred tax asset			$ 5,200,000
Deferred tax asset, valuation allowance	$ 388,000		$ 5,100,000
U.S. deferred tax assets from operations	700,000
Deferred tax assets and related valuation allowance written off	700,000
U.S. deferred tax assets, realizable portion of valuation allowance	3,300,000
Deferred tax assets	$ 3,400,000
Minimum [Member]
Income Tax [Line Items]
Operating loss carryforwards expiration year	2026
Tax credit carryforwards expiration year	2020
Maximum [Member]
Income Tax [Line Items]
Operating loss carryforwards expiration year	2037
Tax credit carryforwards expiration year	2038
Earliest Tax Year [Member]
Income Tax [Line Items]
Tax credits expiration year	2020
Latest Tax Year [Member]
Income Tax [Line Items]
Tax credits expiration year	2023