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Inventories (Details) - USD ($)	Nov. 30, 2016	Feb. 29, 2016
Inventories Tables
Finished goods	$ 606,063	$ 549,106
Work in process	427,999	118,415
Raw materials and subassemblies	911,738	1,452,566
Total	1,945,800	2,120,087
Less: Allowance	227,710	174,704
Net inventories	$ 1,718,090	$ 1,945,383

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