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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) | 12 Months Ended
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Apr. 30, 2020 | Apr. 30, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |  |
Deferred tax assets, beginning balance | $ 14,187,771 | $ 13,235,601
Additions charged to costs and expenses | 0 | 0
Charged to other accounts | 1,341,187 | 952,170
Deductions | 0 | 0
Deferred tax assets, ending balance | $ 15,528,958 | $ 14,187,771

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- Definition Deferred Tax Assets, Valuation Allowance, charged to costs and expenses + References No definition available. + Details
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- Definition Deferred Tax Assets, Valuation Allowance, deductions + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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