Stockholders' Equity - Treasury Stock (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Oct. 16, 2020 |
Apr. 30, 2021 |
Apr. 30, 2020 |
|
| Schedule Of Stockholders Equity [Line Items] | Ìý | Ìý | Ìý |
| Treasury stock (in shares) | Ìý | 155,486 | 16,667 |
| Treasury stock, value | Ìý | $ 1,817,414 | $ 70,000 |
| Treasury shares cancelled (in shares) | 16,667 | Ìý | Ìý |
| Retirement of treasury stock | Ìý | 0 | Ìý |
| Treasury Stock | Ìý | Ìý | Ìý |
| Schedule Of Stockholders Equity [Line Items] | Ìý | Ìý | Ìý |
| Retirement of treasury stock | $ 70,000 | $ (70,000) | Ìý |
| X | ||||||||||
- Definition Schedule Of Stockholders Equity [Line Items] No definition available.
|
| X | ||||||||||
- Definition Amount of decrease of par value, additional paid in capital (APIC) and retained earnings of common and preferred stock retired from treasury when treasury stock is accounted for under the cost method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of shares of common and preferred stock retired from treasury during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|