| Schedule of Deferred Income Tax Assets and Liabilities | Significant components of the Company's deferred income tax assets and liabilities are as follows: 
 
|  |  |  |  |  |  |  |  |  |  
| Ìý | Ìý | April 30, | Ìý |  
| Ìý | Ìý | 2019 | Ìý | Ìý | 2018 | Ìý |  
| Deferred tax assets: | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |  
| Net operating loss carryforward | Ìý | $ | 9,033,235 | Ìý | Ìý | $ | 7,163,547 | Ìý |  
| Allowance for doubtful accounts (recovery) | Ìý | Ìý | 181,774 | Ìý | Ìý | Ìý | 105,122 | Ìý |  
| Deferred rent | Ìý | Ìý | 180,154 | Ìý | Ìý | Ìý | 20,574 | Ìý |  
| Stock-based compensation | Ìý | Ìý | 954,586 | Ìý | Ìý | Ìý | 687,067 | Ìý |  
| Contributions carryforward | Ìý | Ìý | 60 | Ìý | Ìý | Ìý | 60 | Ìý |  
| Total deferred tax assets | Ìý | Ìý | 10,349,809 | Ìý | Ìý | Ìý | 7,976,370 | Ìý |  
| Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |  
| Deferred tax liabilities: | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |  
| Property and equipment | Ìý | Ìý | (234,336 | ) | Ìý | Ìý | (132,042 | ) |  
| Intangibles  | Ìý | Ìý | (64,439 | ) | Ìý | Ìý | (6,573) | Ìý |  
| Total deferred tax liabilities | Ìý | Ìý | (298,775 | ) | Ìý | Ìý | (138,615 | ) |  
| Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |  
| Deferred tax assets, net | Ìý | Ìý | 10,051,034 | Ìý | Ìý | Ìý | 7,837,755 | Ìý |  
| Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |  
| Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |  
| Valuation allowance: | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |  
| Beginning of year | Ìý | Ìý | (7,837,755 | ) | Ìý | Ìý | (9,471,662 | ) |  
| Decrease (increase) during period | Ìý | Ìý | (2,213,279 | ) | Ìý | Ìý | 1,633,907 | Ìý |  
| Ending balance | Ìý | Ìý | (10,051,034 | ) | Ìý | Ìý | (7,837,755 | ) |  
| Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |  
| Net deferred tax asset | Ìý | $ | — | Ìý | Ìý | $ | — | Ìý |  | 
| Schedule of Income Tax Reconciliation | A reconciliation of income tax computed at the U.S. statutory rate to the effective income tax rate is as follows: 
 
|  |  |  |  |  |  |  |  |  |  
| Ìý | Ìý | April 30, | Ìý |  
| Ìý | Ìý | 2019 | Ìý | Ìý | 2018 | Ìý |  
| Statutory U.S. federal income tax rate | Ìý | Ìý | 21.0 | % | Ìý | Ìý | 34.0 | % |  
| State income taxes, net of federal tax benefit | Ìý | Ìý | 3.6 | Ìý | Ìý | Ìý | 3.0 | Ìý |  
| Other | Ìý | Ìý | (0.8 | ) | Ìý | Ìý | (0.9 | ) |  
| Effect of change in federal tax rates | Ìý | Ìý | 0 | Ìý | Ìý | Ìý | (13.0 | ) |  
| Change in valuation allowance | Ìý | Ìý | (23.8 | ) | Ìý | Ìý | (23.1 | ) |  
| Effective income tax rate | Ìý | Ìý | 0.0 | % | Ìý | Ìý | 0.0 | % |  |