v3.26.1
COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
 12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
COMMITMENTS AND CONTINGENCIES    
Operating lease, right-of-use assets $ 144,000 $ 39,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position Other assets. Other assets.
Operating Lease Liability $ 149,000 $ 42,000
Operating Lease, Liability, Statement of Financial Position Accounts payable and accrued expenses Accounts payable and accrued expenses
Total operating lease expense $ 64,000 $ 58,000
2027 24,000  
2028 26,000  
2029 27,000  
2030 29,000  
2031 31,000  
2032 11,000  
Remaining operating lease payments $ 120,000  
Weighted average remaining lease term of operating lease 5 years 4 months 2 days 1 year 4 months 2 days
Weighted average discount rate of operating lease 6.77% 5.50%
Comprehensive limited warranty period 1 year  
Warranty term 10 years  
Minimum    
COMMITMENTS AND CONTINGENCIES    
Non-cancelable operating lease term (in years) 2 years  
Maximum    
COMMITMENTS AND CONTINGENCIES    
Non-cancelable operating lease term (in years) 5 years  
Revolving credit facility    
COMMITMENTS AND CONTINGENCIES    
Loan reserve, completion guarantee $ 1,812,000 $ 1,812,000
Cash collateral on deposit with municipalities $ 338,000 $ 229,000