Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Investments - Investments (Details)

v3.23.3
Note 6 - Investments - Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Schedule of Investments [Line Items]    
Investment, Cost $ 1,996 $ 9,991
Investment, Unrealized gain/(loss) 1 (2)
Investment, Market value 1,997 9,989
United States Treasury Bills [Member]    
Schedule of Investments [Line Items]    
Investment, Cost   9,991
Investment, Unrealized gain/(loss)   (2)
Investment, Market value   $ 9,989
Commercial Notes [Member]    
Schedule of Investments [Line Items]    
Investment, Cost 1,996  
Investment, Unrealized gain/(loss) 1  
Investment, Market value $ 1,997