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, 2018
Mar. 31, 2017
Allowance for doubtful accounts $ 17,000 $ 14,000
Allowance for sales discounts, rebates, distributor fees and returns 1,275,000 672,000
Inventory reserves 111,000 61,000
Transfers in or out of Level 3 0 0
Asset impairment charges 0 0
Research and development expenses 1,575,000 1,576,000
Advertising costs 177,000 149,000
Revenues 16,658,000 12,825,000
Foreign currency translation adjustment 203,000 (324,000)
Foreign currency transaction loss 208,000 208,000
Foreign currency transaction gain 107,000 36,000
Accumulated other comprehensive loss (3,975,000) (4,178,000)
Shipping and Handling [Member]    
Revenues $ 46,000 $ 49,000
Accounts Receivable [Member] | One Customer [Member]    
Significant customer concentration 36.00% 26.00%
Accounts Receivable [Member] | One Customer [Member]    
Significant customer concentration 18.00% 12.00%
Accounts Receivable [Member] | CustomerCMember    
Significant customer concentration   10.00%
Revenues [Member] | One Customer [Member]    
Significant customer concentration 22.00% 12.00%
Revenues [Member] | One Customer [Member]    
Significant customer concentration 19.00% 10.00%
Revenues [Member] | One Customer [Member]    
Significant customer concentration 13.00% 10.00%
Revenues [Member] | One Customer [Member]    
Significant customer concentration 12.00%