v3.26.1
Stock Options and Incentive Plans - Restricted Stock Options Activity (Details) - $ / shares
 3 Months Ended 12 Months Ended 73 Months Ended
Jul. 31, 2026
Apr. 30, 2026
Apr. 30, 2025
Number of Shares      
Outstanding beginning of the period (in shares)     8,595,341
Forfeited (in shares) 0 (5,780) (2,500,000)
Outstanding end of the period (in shares) 6,089,561    
Vested (in shares) 5,988,311    
Nonvested, (in shares) 101,250    
Weighted Average Grant Date Fair Value      
Outstanding beginning of the period (in dollars per share)     $ 0.51
Forfeited (in dollars per share) $ 0 $ 1.73 $ 0.40
Outstanding end of the period (in dollars per share) 0.55    
Vested (in dollars per share) 0.52    
Nonvested (in dollars per share) $ 2.04