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v3.21.1

Common Stock, Preferred Stock and Warrants - Changes in warrants outstanding issued to non-employees of the Company (Details) | 9 Months Ended
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Jan. 31, 2021 USD ($) $ / shares shares
Balance at start of period |
Number of warrants | shares |
Weighted average exercise price |
Weighted average grant date fair value |
Value if exercised | $ |
Granted |
Number of warrants | shares | 1,074,998
Weighted average exercise price | $ 1.50
Weighted average grant date fair value | $ 4.17
Expiration Date | 5 years
Value if exercised | $ | $ 1,612,497
Exercised |
Number of warrants | shares |
Weighted average exercise price |
Weighted average grant date fair value |
Value if exercised | $ |
Cancelled/Expired |
Number of warrants | shares |
Weighted average exercise price |
Weighted average grant date fair value |
Value if exercised | $ |
Outstanding at end of period |
Number of warrants | shares | 1,074,998
Weighted average exercise price | $ 1.50
Weighted average grant date fair value | $ 4.17
Expiration Date | 4 years 10 months 13 days
Value if exercised | $ | $ 1,612,497

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