Annual report pursuant to Section 13 and 15(d)

3. Summary of Significant Accounting Policies (Details Narrative)

v3.7.0.1
3. Summary of Significant Accounting Policies (Details Narrative) - USD ($)
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Allowance for doubtful accounts $ 14,000 $ 15,000
Allowance for sales discounts, rebates, distributor fees and returns 672,000 653,000
Inventory reserves 61,000 164,000
Transfers in or out of Level 3 0 0
Asset impairment charges 0 0
Research and development expenses 1,576,000 1,806,000
Advertising costs 149,000 175,000
Shipping and handling costs 49,000 59,000
Foreign currency translation adjustment (324,000) (347,000)
Foreign currency transaction gain (loss) 36,000 38,000
Accumulated other comprehensive loss $ (4,178,000) $ (3,854,000)
Accounts Receivable [Member] | One Customer [Member]    
Significant customer concentration 26.00% 33.00%
Accounts Receivable [Member] | One Customer [Member]    
Significant customer concentration 12.00%  
Accounts Receivable [Member] | One Customer [Member]    
Significant customer concentration 10.00%  
Revenues [Member] | One Customer [Member]    
Significant customer concentration 12.00% 40.00%
Revenues [Member] | One Customer [Member]    
Significant customer concentration   15.00%
Revenues [Member] | One Customer [Member]    
Significant customer concentration   14.00%
Revenues [Member] | One Customer [Member]    
Significant customer concentration 10.00%  
Revenues [Member] | One Customer [Member]    
Significant customer concentration 10.00%  
Revenues [Member] | Two Customers [Member]    
Significant customer concentration   12.00%