Note 3 - Divestiture of Subsidiary - Assets and Liabilities Included in Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Jun. 01, 2023
Gain on sale recognized	$ 980	$ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Bel Stewart s.r.o. [Member]
Cash and cash equivalents	2,072
Accounts receivable	1,030
Inventories	1,310
Property, plant and equipment	326
Other assets	48
Accounts payable	441
Accrued expenses	126
Income taxes payable	100
Other current liabilities	13
Other long-term liabilities	23
Total net assets transferred	4,083
Consideration received	5,063		$ 5,100
Gain on sale recognized	$ 980