SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Apr. 30, 2018 |
Apr. 30, 2017 |
|
| SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] | ||
| Deferred tax assets, beginning balance | $ 11,521,295 | $ 10,254,426 |
| Additions charged to costs and expenses | 0 | 0 |
| Charged to other accounts | 1,714,306 | 1,266,869 |
| Deductions | 0 | 0 |
| Deferred tax assets, ending balance | $ 13,235,601 | $ 11,521,295 |
| X | ||||||||||
- Definition Deferred tax assets additions charged to costs and expenses No definition available.
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| X | ||||||||||
- Definition Deferred tax assets charged to other accounts No definition available.
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| X | ||||||||||
- Definition Deferred tax assets, deductions No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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