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Inventories (Details) (USD $)
Jun. 30, 2012
Mar. 31, 2012
Inventories [Abstract]    
Raw materials $ 1,538,183 $ 1,285,106
Work in process 1,564,632 1,658,467
Finished goods 729,281 585,803
Inventory, Gross, Total 3,832,096 3,529,376
Less inventory reserve (285,000) (300,000)
Total inventories $ 3,547,096 $ 3,229,376