Annual report pursuant to Section 13 and 15(d)

3. Summary of Significant Accounting Policies (Details Narrative)

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3. Summary of Significant Accounting Policies (Details Narrative) - USD ($)
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Allowance for doubtful accounts $ 1,028,000 $ 24,000
Allowance for sales discounts, rebates, distributor fees and returns 1,230,000 443,000
Inventory reserves 600,000 184,000
Transfers in or out of Level 3 0 0
Asset impairment charges 0 0
Research and development expenses 1,339,000 1,518,000
Advertising costs 35,000 157,000
Revenues 18,936,000 18,970,000
Foreign currency translation adjustment (1,261,000) (374,000)
Foreign currency transaction loss 306,000 162,000
Accumulated other comprehensive loss (5,610,000) (4,349,000)
Shipping and Handling [Member]    
Revenues $ 57,000 $ 55,000
Revenues [Member] | First Customer [Member]    
Significant customer concentration 15.00% 18.00%
Revenues [Member] | Second Customer [Member]    
Significant customer concentration 11.00% 10.00%