v3.25.2
Note 10 - Common, Preferred Stock and Stockholders' Equity (Details Textual) - USD ($)
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Shares Authorized (in shares) 60,000,000  
Common Stock, Shares Authorized (in shares) 50,000,000 50,000,000
Preferred Stock, Shares Authorized (in shares) 10,000,000 10,000,000
Preferred Stock, Shares Issued (in shares) 0 0
Common Stock, Par or Stated Value Per Share (in dollars per share) $ 0.02 $ 0.02
Stock Issued During Period, Value, New Issues $ 20,000 $ 11,000
Proceeds from Issuance of Common Stock $ 0 $ 388,000
Preferred Stock, Shares Outstanding (in shares) 0 0
Private Placement [Member] | Board of Directors Chairman [Member]    
Stock Issued During Period, Shares, New Issues (in shares)   400,000
Common Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.02
Shares Issued, Price Per Share (in dollars per share)   $ 1
Stock Issued During Period, Value, New Issues   $ 400,000
Legal Fees   12,000
Proceeds from Issuance of Common Stock   $ 388,000