INVENTORIES (Details) - USD ($)	Nov. 30, 2022	Feb. 28, 2022
Inventory, Gross, Total	$ 7,071,000	$ 7,637,000
Inventory, Reserve	(4,587,000)	(5,377,000)
Inventory, Net	2,484,000	2,260,000
Inventory, Net	2,484,000	2,260,000
Inventories, Raw Material Member
Inventory, Gross, Total	1,270,000	1,504,000
Inventory, Reserve	(480,000)	(813,000)
Inventory, Net	790,000	691,000
Inventories, Work In Process Member
Inventory, Gross, Total	5,312,000	5,410,000
Inventory, Reserve	(3,645,000)	(3,906,000)
Inventory, Net	1,667,000	1,504,000
Inventories, Finished Goods Member
Inventory, Gross, Total	489,000	723,000
Inventory, Reserve	(462,000)	(658,000)
Inventory, Net	$ 27,000	$ 65,000