Annual report pursuant to Section 13 and 15(d)

3. Summary of Significant Accounting Policies (Details Narrative)

v3.5.0.1
3. Summary of Significant Accounting Policies (Details Narrative) - USD ($)
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Long-term investment $ 0 $ 4,538,000
Allowance for doubtful accounts 15,000 20,000
Allowance for sales discounts, rebates, distributor fees and returns 653,000 183,000
Inventory reserves 164,000 87,000
Impairment on investment 0 (4,650,000)
Research and development expenses 1,806,000 1,533,000
Advertising costs 175,000 231,000
Shipping and handling costs 59,000 114,000
Foreign currency transaction gain (loss) 38,000 (24,000)
Foreign currency translation adjustment (347,000) (438,000)
Accumulated other comprehensive loss $ (3,854,000) (3,507,000)
Ruthigen [Member]    
Long-term investment   $ 4,538,000
Long-term investment, shares held 0 1,650,000
Proceeds from sale of investment $ 4,537,500  
Banker fee on sale of investment $ 165,000  
Impairment on investment   $ (4,650,000)
Accounts Receivable [Member] | One Customer [Member]    
Significant customer concentration 33.00% 56.00%
Accounts Receivable [Member] | Customer Two [Member]    
Significant customer concentration   14.00%
Revenues [Member] | One Customer [Member]    
Significant customer concentration 40.00% 47.00%
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 12.00%  
Revenues [Member] | One Customer [Member]    
Significant customer concentration 12.00%