Income Taxes - Income Tax Provision/(Benefit) and Deferred Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Undistributed Earnings of Foreign Subsidiaries	$ 52,000,000
Deferred income tax assets benefits percentage	100.00%
Valuation allowance	$ 21,700,000	$ 19,916,000
Domestic Country
Income Taxes [Line Items]
Valuation allowance	0
Operating loss carryforward	$ 24,000,000	29,000,000
Operating Loss Carryforwards, Expiration Dates	begin to expire in 2024 and can be utilized through 2030
State And Local Jurisdiction
Income Taxes [Line Items]
Valuation allowance	$ 2,100,000
Deferred income tax assets net of federal benefit	4,000,000.0
Operating loss carryforward	$ 49,000,000	51,000,000
Operating Loss Carryforwards, Expiration Dates	will expire beginning in 2021 and end in 2045
Foreign Country
Income Taxes [Line Items]
Valuation allowance	$ 19,600,000
Deferred income tax assets net of federal benefit	29,700,000
Operating loss carryforward	$ 107,000,000	$ 96,000,000
Operating Loss Carryforwards, Expiration Dates	2034