Note 4 - Debt - Unused Availability (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Unused Availability	$ 5,446	$ 6,674
UNITED STATES
Unused Availability	4,601	5,319
MEXICO
Unused Availability	1	743
CHINA
Unused Availability	0	157
AUSTRALIA
Unused Availability	390	455
SOUTH AFRICA
Unused Availability	$ 454	$ 0