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4. Condensed Consolidated Balance Sheets (Tables)
6 Months Ended
Sep. 30, 2014
Balance Sheet Related Disclosures [Abstract]  
Inventories
   September 30,   March 31, 
   2014   2014 
Raw materials  $796,000   $743,000 
Finished goods   439,000    345,000 
   $1,235,000   $1,088,000