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Note 10 - Fair Value Measurements (Details Textual) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2022
Jun. 30, 2022
Debt Security, Corporate, Non-US [Member]        
Debt Instrument, Interest Rate, Stated Percentage     8.75%  
PEMEX [Member]        
Accounts Receivable, before Allowance for Credit Loss, Current $ 0.1     $ 8.6
Debt Securities, Available-for-Sale, Term (Year)       7 years
Debt Securities, Available-for-Sale, Sold at Par Value $ 0.6 $ 8.0