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Note 1 - Organization and Basis of Presentation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Mar. 31, 2025
May 14, 2024
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation $ 11,921   $ 4,149  
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest (3,864) $ (1,557)    
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation (3,047) $ 1,342    
Working Capital (11,000)      
Potential Financing Amount $ 150,000      
Common Stock, Par or Stated Value Per Share (in dollars per share) $ 0.001   $ 0.001  
Roth Capital [Member]        
Sale of Stocks, Maximum Amount Authorized to Sell       $ 25,000