Note K - Domestic and Foreign Revenues - Schedule of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
REVENUES	$ 441	$ 417
CANADA
REVENUES	43	33
INDIA
REVENUES	23	31
FRANCE
REVENUES	4	125
ROMANIA
REVENUES	0	35
All Other Foreign Countries [Member]
REVENUES	7	42
Non-US [Member]
REVENUES	77	266
UNITED STATES
REVENUES	$ 364	$ 151