Annual report pursuant to Section 13 and 15(d)

6. Inventories (Tables)

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6. Inventories (Tables)
 12 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of inventories
    March 31,  
    2017     2016  
Raw materials   $ 1,480,000     $ 1,059,000  
Finished goods     741,000       536,000  
    $ 2,221,000     $ 1,595,000