Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Tax Credit Carryforward [Line Items]
Valuation allowance against a deferred tax asset related to net operating loss	$ 2,169,000	$ 2,140,000
Undistributed earnings	15,000,000.0
Undistributed earnings to be reinvested	13,400,000
Accrued interest (approximate)	100,000	100,000
Penalties accrued	0	$ 0
German
Tax Credit Carryforward [Line Items]
Valuation allowance against a deferred tax asset related to net operating loss	500,000
State Tax Credits
Tax Credit Carryforward [Line Items]
Remaining tax credit carryforward	$ 6,000,000.0