Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Examination [Line Items]
Income tax expense (benefit)	$ 409,000	$ (234,000)	$ 462,000	$ 92,000
Excess tax benefits from employee stock option exercises			$ 367,000
Effective income tax rate (as a percent)			10.00%	13.00%
Need for valuation allowance based on history of cumulative losses			3 years