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Note 1 - Organization and Basis of Presentation (Details Textual)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Sep. 26, 2025
$ / shares
Sep. 30, 2025
USD ($)
$ / shares
Jun. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Jun. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
$ / shares
Sep. 30, 2024
USD ($)
Mar. 31, 2025
USD ($)
$ / shares
May 14, 2024
USD ($)
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares $ 0.001 $ 0.001       $ 0.001   $ 0.001  
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation   $ 11,754       $ 11,754   $ 4,149  
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest   (5,705) $ (3,864) $ (2,317) $ (1,557) (9,569) $ (3,875)    
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation           (6,254) $ 7,114    
Working Capital   (13,100)       (13,100)      
Potential Financing Amount   $ 150,000       $ 150,000      
Roth Capital [Member]                  
Sale of Stocks, Maximum Amount Authorized to Sell                 $ 25,000
Reverse Stock Split [Member]                  
Stockholders' Equity Note, Stock Split, Conversion Ratio 10