Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Share-based Payment Arrangement, Option, Exercise Price Range (Details)

v3.22.2.2
Stockholders' Equity - Share-based Payment Arrangement, Option, Exercise Price Range (Details)
 3 Months Ended
Jul. 31, 2022
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding (in shares) | shares 795,182
Exercisable (in shares) | shares 786,549
Warrant  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding (in shares) | shares 425,000
Exercisable (in shares) | shares 400,000
Warrant | $1.00  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum exercise price (in dollars per share) $ 1.00
Maximum exercise price (in dollars per share) 1.00
Weighted average exercise price (in dollars per share) $ 1.00
Outstanding (in shares) | shares 200,000
Weighted average exercise price (in dollars per share) $ 1.00
Weighted average remaining life in years 4 years 8 months 26 days
Exercisable (in shares) | shares 200,000
Warrant | $4.89  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum exercise price (in dollars per share) $ 4.89
Maximum exercise price (in dollars per share) 4.89
Weighted average exercise price (in dollars per share) $ 4.89
Outstanding (in shares) | shares 50,000
Weighted average exercise price (in dollars per share) $ 4.89
Weighted average remaining life in years 1 year 8 months 12 days
Exercisable (in shares) | shares 50,000
Warrant | $5.85  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum exercise price (in dollars per share) $ 5.85
Maximum exercise price (in dollars per share) 5.85
Weighted average exercise price (in dollars per share) $ 5.85
Outstanding (in shares) | shares 50,000
Weighted average exercise price (in dollars per share) $ 5.85
Weighted average remaining life in years 4 years 1 month 2 days
Exercisable (in shares) | shares 50,000
Warrant | $6.00  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum exercise price (in dollars per share) $ 6.00
Maximum exercise price (in dollars per share) 6.00
Weighted average exercise price (in dollars per share) $ 6.00
Outstanding (in shares) | shares 100,000
Weighted average exercise price (in dollars per share) $ 6.00
Weighted average remaining life in years 1 year 7 months 6 days
Exercisable (in shares) | shares 100,000
Warrant | $6.99  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum exercise price (in dollars per share) $ 6.99
Maximum exercise price (in dollars per share) 6.99
Weighted average exercise price (in dollars per share) $ 6.99
Outstanding (in shares) | shares 25,000
Weighted average exercise price (in dollars per share) $ 0.00
Weighted average remaining life in years 0 years
Exercisable (in shares) | shares 0