Inventories (Details) - USD ($)	Aug. 31, 2015	Feb. 28, 2015
Schedule of Inventories
Inventory, Raw Materials, Gross	$ 2,022,000	$ 2,124,000
Inventory, Work-In-Process, Gross	3,708,000	3,744,000
Inventory, Finished Goods, Gross	1,079,000	1,077,000
Inventory, Gross, Total	6,809,000	6,945,000
Inventory Raw Material, Reserve	(472,000)	(404,000)
Inventory Work-In-Process, Reserve	(1,668,000)	(1,624,000)
Inventory Finished Goods, Reserve	(769,000)	(720,000)
Inventories, Reserve, Total	(2,909,000)	(2,748,000)
Inventory, Raw material, Net	1,550,000	1,720,000
Inventory, Work in Process, Net	2,040,000	2,120,000
Inventory, Finished Goods, Net	310,000	357,000
Inventories, Net, Total	$ 3,900,000	$ 4,197,000