Annual report pursuant to Section 13 and 15(d)

15. Income Taxes (Tables)

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15. Income Taxes (Tables)
12 Months Ended
Mar. 31, 2016
Income Tax Disclosure [Abstract]  
Deferred tax assets
    March 31,  
    2016     2015  
Deferred tax assets:                
Net operating loss carryforwards   $ 36,454,000     $ 36,661,000  
Research and development tax credit carryforwards     1,710,000       1,667,000  
Stock-based compensation     5,083,000       4,880,000  
Reserves and accruals     1,111,000       1,731,000  
Other deferred tax assets     241,000       49,000  
State income taxes     (1,000 )     (1,000 )
Basis difference in assets     8,000       5,000  
Total deferred tax assets   $ 44,606,000     $ 44,992,000  
Deferred tax liabilities:                
Unrealized gain on Ruthigen           (1,105,000 )
Net deferred tax asset     44,606,000       43,887,000  
Valuation allowance     (44,606,000 )     (43,887,000 )
Net deferred tax asset   $     $  
Schedule of income tax expense
    Years Ended March 31,  
    2016     2015  
Income tax (benefit)   $ (719,000 )   $ (2,613,000 )
Change in valuation allowance     719,000       2,613,000  
Net income tax expense   $     $  
Reconciliation of federal income tax rate to effective rate
    Years Ended March 31,  
    2016     2015  
Expected federal statutory rate     (34.0% )     (34.0% )
State income taxes, net of federal benefit     (1.8% )     (1.8% )
Research and development credit     (0.4% )     (0.2% )
Foreign earnings taxed at different rates     0.7%       0.5%  
Effect of state net operating loss expiration     5.5%      
Effect of permanent differences     (3.3% )     (20.6% )
Impact of foreign exchange rate fluctuations on foreign deferred income taxes     8.5%       25.0%  
Impact of change in foreign net operating loss     6.3%       (9.6% )
Cancellation of stock options and other true-ups     0.0%     (2.7% )
Adjustment of NOL due to Ruthigen deconsolidation     0.0%       8.6%  
True-up of state deferred assets     11.4%       3.0%  
      (7.1% )     (31.8% )
Change in valuation allowance     7.1%       31.8%  
Totals     0.0%       0.0%