Note 5 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Expense (Benefit), Continuing Operations, Global Intangible Low-taxed Income	$ 325	$ 400
Effective Income Tax Rate Reconciliation, Percent, Total	56.60%	51.30%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Deferred Tax Assets, Net, Total	$ 3,766	$ 4,468
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	46
Unrecognized Tax Benefits, Income Tax Penalties Expense	800	3
Unrecognized Tax Benefits, Interest on Income Taxes Expense	300	700
Unrecognized Tax Benefits, Income Tax Penalties Accrued	14	13
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 17	$ 16
Open Tax Year	2019 2020 2021 2022
Domestic Tax Authority [Member]
Deferred Tax Assets, Net, Total	$ 2,200
Unrecognized Tax Benefits, Income Tax Penalties Accrued	0
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 0
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Operating Loss Carryforwards	$ 5,100
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	1,100
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	630
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	240
State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	88,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued	14
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	17
Foreign Tax Authority [Member]
Unrecognized Tax Benefits, Income Tax Penalties Accrued	0
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	0
Foreign Tax Authority [Member] | Brazilian Federal Revenue Office [Member]
Operating Loss Carryforwards, Not Subject to Expiration	1,900
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	662
Foreign Tax Authority [Member] | Australian Taxation Office [Member]
Operating Loss Carryforwards, Not Subject to Expiration	1,200
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	346
Foreign Tax Authority [Member] | State Administration of Taxation, China [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	264
Operating Loss Carryforwards, Subject to Expiration	1,100
Foreign Tax Authority [Member] | Mexican Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	187
Operating Loss Carryforwards, Subject to Expiration	622
Foreign Tax Authority [Member] | National Tax Agency, Japan [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	4
Operating Loss Carryforwards, Subject to Expiration	$ 11