Note 6 - Disaggregation of Revenue and Major Customers - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) - USD ($)	3 Months Ended		9 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Revenues	$ 3,369,000	$ 4,136,000	$ 10,917,000	$ 8,753,000
Europe and Australia [Member]
Revenues	13,000	1,000	46,000	4,000
Canada and Latin America [Member]
Revenues	0	1,000	0	2,000
Far East and Middle East [Member]
Revenues	0	0	0	0
UNITED STATES
Revenues	$ 3,356,000	$ 4,134,000	$ 10,871,000	$ 8,747,000