Leases - Future Minimum Payments Under Operating Leases (Details) - USD ($)  | 
Apr. 30, 2020  | 
May 01, 2019  | 
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| Leases [Abstract] | Ìý | Ìý | 
| 2021 | $ 2,409,191 | Ìý | 
| 2022 | 2,250,755 | Ìý | 
| 2023 | 1,686,197 | Ìý | 
| 2024 | 1,488,839 | Ìý | 
| 2025 | 1,136,640 | Ìý | 
| Thereafter | 779,286 | Ìý | 
| Total | 9,750,908 | Ìý | 
| Less Interest | (2,382,321) | Ìý | 
| Present value of operating lease obligations | $ 7,368,587 | $ 8,800,000 | 
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- References No definition available. 
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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