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Inventories
9 Months Ended
Dec. 31, 2011
Inventories [Abstract]  
Inventories
5. Inventories

Inventories are stated at the lower of cost (first-in, first-out method) or market (net realizable value).  Inventories consist of the following:
        
   
December 31, 2011
  
March 31, 2011
 
        
Raw materials
 $182,000  $233,000 
Work-in-process
  27,000   9,000 
Finished goods
  601,000   436,000 
          
   $810,000  $678,000