Note 5 - Income Taxes - Income Taxes Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Provision for income taxes at federal statutory rate	$ 863	$ 1,947
Provision for income taxes at federal statutory rate, rate	21.00%	21.00%
State income taxes, net of federal benefit	$ 68	$ 144
State income taxes, net of federal benefit, rate	1.60%	1.60%
Permanent differences	$ 74	$ 56
Permanent differences, rate	1.80%	0.60%
Foreign tax rate differential	$ 731	$ 112
Foreign tax rate differential, rate	17.80%	1.20%
GILTI tax	$ 401	$ 344
GILTI tax, rate	9.70%	3.70%
2018 and 2019 impact of high tax exception, rate	0.00%	(5.90%)
2018 and 2019 impact of high tax exception		$ (545)
Brazil Deferred Tax Allowance Release	$ 0	$ (2,158)
Brazil Deferred Tax Allowance Release, rate	0.00%	(23.30%)
Other	$ (29)	$ 412
Other, rate		4.40%
Net expense	$ 2,108	$ 312
Net expense, rate	51.30%	3.30%