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Annual report pursuant to Section 13 and 15(d)

Income Taxes (Schedule of Defered Income Tax Assets and Liabilities) (Details)

v3.7.0.1
Income Taxes (Schedule of Defered Income Tax Assets and Liabilities) (Details) - USD ($)
Apr. 30, 2017
Apr. 30, 2016
Apr. 30, 2015
Deferred tax assets:      
Net operating loss $ 8,626,748 $ 8,271,894  
Allowance for doubtful accounts (recovery) (20,029) 26,793  
Intangible assets 201,942 249,099  
Deferred rent 16,911 11,678  
Stock-based compensation 820,257 694,900  
Contributions carryforward 93 93  
Total deferred tax assets 9,645,922 9,254,457  
Deferred tax liabilities:      
Property and equipment (174,260) (185,683)  
Total deferred tax liabilities (174,260) (185,683)  
Deferred tax assets, net 9,471,662 9,068,774  
Valuation allowance:      
Valuation allowance (9,471,662) (9,068,774) $ (8,240,200)
Net deferred tax asset