v3.25.2
Note 14 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%
Operating Loss Carryforwards $ 19,220,000  
Domestic Tax Jurisdiction [Member]    
Operating Loss Carryforwards $ 19,220,000  
Operating Loss Carryforwards, Expiration Period (Year) 20 years  
Domestic Tax Jurisdiction [Member] | Prior To 2018 Tax Year [Member]    
Operating Loss Carryforwards Subject to Expiration $ 7,203,000  
Domestic Tax Jurisdiction [Member] | After 2018 Tax Year [Member]    
Operating Loss Carryforwards 12,017,000  
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards 17,982,000  
State and Local Jurisdiction [Member] | Other States [Member]    
Operating Loss Carryforwards 953,000  
State and Local Jurisdiction [Member] | Carryforwards Expire March 31, 2037 through 2045 [Member] | California Franchise Tax Board [Member]    
Operating Loss Carryforwards Subject to Expiration 6,070,000  
State and Local Jurisdiction [Member] | Carryforwards Expire March 31, 2030 through 2045 [Member] | State of Hawaii Department of Taxation [Member]    
Operating Loss Carryforwards Subject to Expiration $ 10,959,000