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Summary of Significant Accounting Policies (Details 2) (Inventory reserve, USD $)
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Inventory reserve
   
Activity in inventory reserve for obsolescence    
Balance, beginning of year $ 117,000 $ 60,000
Provision for estimated obsolescence 47,280 145,409
Write-off of obsolete inventory (113,280) (88,409)
Balance, end of year $ 51,000 $ 117,000