Note K - Domestic and Foreign Revenues - Schedule of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
REVENUES	$ 403	$ 370	$ 844	$ 787
CANADA
REVENUES	47	16	90	49
SPAIN
REVENUES	236	21	236	31
FRANCE
REVENUES	5	0	9	125
ROMANIA
REVENUES	0	55	0	90
All Other Foreign Countries [Member]
REVENUES	69	25	76	67
Non-US [Member]
REVENUES	357	117	411	362
UNITED STATES
REVENUES	$ 46	$ 253	$ 433	$ 425