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Note 2 - Risks and Uncertainties (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Retained Earnings (Accumulated Deficit) $ 109,883           $ 109,883   $ 91,094  
Net Income (Loss) Attributable to Parent 7,831 $ 5,833 $ 5,125 $ 4,402 $ 22,130 $ 3,666 18,789 $ 30,198    
Net Cash Provided by (Used in) Operating Activities             22,169 10,273    
Net Cash Provided by (Used in) Financing Activities             21,393 5    
Cash and Cash Equivalents, at Carrying Value 907           907   1,285  
Working Capital 7,000           7,000      
Equity, Attributable to Parent $ (2,483) $ 4,796 $ 2,525 $ (8,278) $ (4,838) $ 6,582 $ (2,483) $ (8,278) $ (8,049) $ 10,213