Income Taxes - Additional Information (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jun. 29, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax [Line Items]
Income tax expense		$ 1,619,000	$ 289,000	$ 2,452,000	$ 1,098,000
Income (loss) before income taxes		1,500,000	(3,700,000)	(6,600,000)	(2,000,000.0)
Unrecognized tax benefits		1,000,000.0		1,000,000.0
Unrecognized tax benefits, period increase (decrease)		0	$ 0	0	$ 0
Taxable years 2020, 2021, and 2022
Income Tax [Line Items]
Business incentive tax credits to offset minimum tax per year	$ 5,000,000
Minimum taxable income for suspension on use of net operating losses	$ 1,000,000
COVID-19 Pandemic
Income Tax [Line Items]
Deferred cash payroll tax		$ 200,000		$ 500,000