Note 14 - Domestic and Foreign Revenues - Schedule of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net sales	$ 661	$ 650	$ 1,650	$ 1,573
SPAIN
Net sales	120	230	220	334
UNITED KINGDOM
Net sales	0	7	104	18
NETHERLANDS
Net sales	90	0	90	21
FRANCE
Net sales	67	0	71	24
AUSTRALIA
Net sales	0	84	42	171
INDIA
Net sales	0	94	7	193
ROMANIA
Net sales	0	0	0	94
All Other Foreign Countries [Member]
Net sales	42	39	142	42
Non-US [Member]
Net sales	319	454	676	897
UNITED STATES
Net sales	$ 342	$ 196	$ 974	$ 676