Schedule of Customer Concentrations and Foreign Sales (Details) - USD ($)	3 Months Ended		9 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Total sales	$ 2,001,000	$ 3,431,000	$ 6,225,000	$ 8,365,000
Asia Pacific [Member]
Total sales	834,000	1,901,000	2,367,000	4,754,000
EMEA [Member]
Total sales	731,000	1,287,000	2,557,000	2,723,000
Latin America [Member]
Total sales	$ 436,000	$ 243,000	$ 1,301,000	$ 888,000