Note 14 - Domestic and Foreign Revenues - Schedule of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Net sales	$ 720	$ 661	$ 2,152	$ 1,650
AUSTRALIA
Net sales	1	0	63	42
GERMANY
Net sales	0	0	27	0
SPAIN
Net sales	7	120	24	220
FRANCE
Net sales	21	67	21	71
NORWAY
Net sales	21	0	21	34
ITALY
Net sales	7	6	15	6
NETHERLANDS
Net sales	0	90	14	90
UNITED KINGDOM
Net sales	0	0	12	104
All Other Foreign Countries [Member]
Net sales	8	36	57	109
Non-US [Member]
Net sales	65	319	254	676
UNITED STATES
Net sales	$ 655	$ 342	$ 1,898	$ 974