CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) |
3 Months Ended | 9 Months Ended |
|---|---|---|
Jan. 31, 2020 |
Jan. 31, 2020 |
|
| Statement of Stockholders' Equity [Abstract] | 听 | 听 |
| Underwriter costs | $ 1,222,371 | $ 1,222,371 |
| X | ||||||||||
- Definition Noncash Stock Issuance Costs No definition available.
|
| X | ||||||||||
- References No definition available.
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