Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of All Options and Exercisable Options (Details)

v3.22.2.2
Stockholders' Equity - Schedule of All Options and Exercisable Options (Details)
 6 Months Ended
Oct. 31, 2022
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding (in shares) | shares 733,828
Exercisable (in shares) | shares 733,828
$3.24 to $4.38  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum exercise price (in dollars per share) $ 3.24
Maximum exercise price (in dollars per share) 4.38
Weighted average exercise price (in dollars per share) $ 3.82
Outstanding (in shares) | shares 31,998
Weighted average exercise price (in dollars per share) $ 4.00
Weighted average remaining life in years 1 year 9 months
Exercisable (in shares) | shares 31,998
$4.50 to $5.20  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum exercise price (in dollars per share) $ 4.50
Maximum exercise price (in dollars per share) 5.20
Weighted average exercise price (in dollars per share) $ 4.94
Outstanding (in shares) | shares 123,379
Weighted average exercise price (in dollars per share) $ 4.97
Weighted average remaining life in years 1 year 3 months 10 days
Exercisable (in shares) | shares 123,379
$7.17 to $7.55  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum exercise price (in dollars per share) $ 7.17
Maximum exercise price (in dollars per share) 7.55
Weighted average exercise price (in dollars per share) $ 7.45
Outstanding (in shares) | shares 463,702
Weighted average exercise price (in dollars per share) $ 7.46
Weighted average remaining life in years 9 months 29 days
Exercisable (in shares) | shares 463,702
$8.57 to $9.07  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Minimum exercise price (in dollars per share) $ 8.57
Maximum exercise price (in dollars per share) 9.07
Weighted average exercise price (in dollars per share) $ 8.98
Outstanding (in shares) | shares 114,749
Weighted average exercise price (in dollars per share) $ 8.98
Weighted average remaining life in years 2 months 4 days
Exercisable (in shares) | shares 114,749