Annual report pursuant to Section 13 and 15(d)

5. Inventories (Tables)

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5. Inventories (Tables)
12 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories
    March 31,  
    2019     2018  
Raw materials   $ 1,766,000     $ 1,619,000  
Finished goods     1,643,000       1,246,000  
    $ 3,409,000     $ 2,865,000