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Note 9 - Related Party Transactions (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Affiliated Entity [Member] | Tmg [Member]          
Related Party Transaction, Purchases from Related Party $ 100 $ 200 $ 200 $ 400  
Revenues     0 $ 0  
Accounts Receivable, after Allowance for Credit Loss 0   0   $ 0
Affiliated Entity [Member] | Board of Directors Chairman [Member] | Tmg [Member]          
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest       50.00%  
Chart E&C [Member]          
Related Party Transaction, Purchases from Related Party 5 $ 11 400 $ 22  
Revenues     0 $ 0  
Accounts Receivable, after Allowance for Credit Loss $ 0   $ 0   $ 0
Common Stock, Ownership Percentage 7.90%   7.90%