CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (Parenthetical) - USD ($) |
3 Months Ended | |
|---|---|---|
Jul. 31, 2019 |
Jul. 31, 2018 |
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| Statement of Stockholders' Equity [Abstract] | ||
| Issuance costs | $ 42,000 | $ 105,000 |
| X | ||||||||||
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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