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6. Inventories (Details) (USD $)
Dec. 31, 2012
Jun. 30, 2012
Inventories Details    
Raw materials $ 1,297,300 $ 1,146,800
Work-in-process 369,900 221,900
Finished goods 167,500 245,000
Inventory $ 1,834,700 $ 1,613,700