Income Taxes - Details Textual (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
Interest and penalties accrued	$ 0	$ 0
Provision for income taxes for undistributed earnings of foreign subsidiaries	0
Undistributed earnings of foreign subsidiaries	1,032,000	$ 999,000
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Net operating loss carryforwards	20,242,000
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Net operating loss carryforwards	20,279,000
Research Tax Credit Carryforward | Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Tax credit carryforward, amount	257,000
Research Tax Credit Carryforward | State and Local Jurisdiction
Income Tax Contingency [Line Items]
Tax credit carryforward, amount	183,000
Research Tax Credit Carryforward | Foreign Tax Authority
Income Tax Contingency [Line Items]
Tax credit carryforward, amount	$ 165,000