Inventories (Details) (USD $)	Aug. 31, 2012	Feb. 29, 2012
Schedule of Inventories
Inventory, Raw Materials, Gross	$ 1,974,000	$ 1,525,000
Inventory, Work in Process, Gross	3,075,000	2,883,000
Inventory, Finished Goods, Gross	543,000	625,000
Inventory, Gross, Total	5,592,000	5,033,000
Inventory Raw Material Reserve	(450,000)	(407,000)
Inventory Work-In-Process Reserve	(1,142,000)	(1,065,000)
Inventory Finished Goods Reserve	(539,000)	(579,000)
Inventory Adjustments, Total	(2,131,000)	(2,051,000)
Inventory, Raw material, Net	1,524,000	1,118,000
Inventory, Work in Process, Net	1,933,000	1,818,000
Inventory, Finished Goods, Net	4,000	46,000
Inventories, Net	$ 3,461,000	$ 2,982,000