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Note 1 - Organization and Basis of Presentation (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents $ 3,811 $ 8,649 $ 3,811 $ 8,649 $ 3,811 $ 8,649
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest (7,927) $ (3,409) (8,422) (2,061) (8,422) $ (2,061)
Net Cash Provided by (Used in) Operating Activities     (45) $ (6,797)    
Working Capital 20,400   20,400   20,400  
Potential Financing Amount $ 150,000   150,000   $ 150,000  
Approximate [Member]            
Net Cash Provided by (Used in) Operating Activities     $ (100)