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Quarterly report pursuant to Section 13 or 15(d)

Subsequent Event - Narrative (Details)

v3.20.4
Subsequent Event - Narrative (Details) - USD ($)
Dec. 15, 2020
Oct. 31, 2020
Apr. 30, 2020
Oct. 31, 2019
Subsequent Event [Line Items] Ìý Ìý Ìý Ìý
Restricted cash Ìý $ 4,644,618 $ 3,556,211 $ 454,288
Collateral Pledged, Bank Letter of Credit Ìý Ìý Ìý Ìý
Subsequent Event [Line Items] Ìý Ìý Ìý Ìý
Restricted cash Ìý $ 379,345 $ 255,708 Ìý
Collateral Pledged, Bank Letter of Credit | Subsequent Event Ìý Ìý Ìý Ìý
Subsequent Event [Line Items] Ìý Ìý Ìý Ìý
Restricted cash $ 10,000 Ìý Ìý Ìý