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Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Summary of Warrant Activity (Details)

v3.22.0.1
Stockholders' Equity - Summary of Warrant Activity (Details) - Warrant - USD ($)
9 Months Ended
Jan. 31, 2022
Apr. 30, 2021
Jan. 31, 2022
Number of Shares Ìý Ìý Ìý
Balance Outstanding, April 30, 2021 (in shares) Ìý Ìý 374,174
Granted (in shares) Ìý Ìý 75,000
Warrants exercised (in shares) Ìý Ìý 0
Surrendered (in shares) Ìý Ìý 0
Expired (in shares) Ìý Ìý 0
Balance Outstanding, January 31, 2022 (in shares) 449,174 374,174 449,174
Exercisable, January 31, 2022 (in shares) 424,174 Ìý 424,174
Weighted Average Exercise Price Ìý Ìý Ìý
Balance Outstanding, April 30, 2021 (in dollars per share) Ìý Ìý $ 6.37
Granted (in dollars per share) Ìý Ìý 6.23
Exercised (in dollars per share) Ìý Ìý 0
Surrendered (in dollars per share) Ìý Ìý 0
Expired (in dollars per share) Ìý Ìý 0
Balance Outstanding, January 31, 2022 (in dollars per share) $ 6.35 $ 6.37 6.35
Exercisable, January 31, 2022 (in dollars per share) $ 6.31 Ìý $ 6.31
Weighted Average Remaining Contractual Term Ìý Ìý Ìý
Weighted Average Remaining Contractual Term, Outstanding 1 year 8 months 15 days 1 year 10 months 24 days Ìý
Weighted Average Remaining Contractual Term, Granted Ìý Ìý 4 years 6 months 18 days
Weighted Average Remaining Contractual Term, Exercisable 1 year 6 months 18 days Ìý Ìý
Aggregate Intrinsic Value Ìý Ìý Ìý
Average Intrinsic Value $ 0 $ 0 $ 0
Aggregate Intrinsic Value, Exercisable $ 0 Ìý $ 0