Annual report pursuant to Section 13 and 15(d)

4. Accounts Receivable (Tables)

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4. Accounts Receivable (Tables)
12 Months Ended
Mar. 31, 2019
Receivables [Abstract]  
Accounts receivable
    March 31,  
    2019     2018  
Accounts receivable   $ 3,948,000     $ 2,829,000  
Less: allowance for doubtful accounts     (24,000 )     (17,000 )
Less: discounts, rebates, distributor fees and returns     (443,000 )     (1,275,000 )
    $ 3,481,000     $ 1,537,000