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Note 2 - Summary of Significant Accounting Policies - Analysis of Change in Allowance for Bad Debt (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Balance at beginning of period | $ (8,704) | $ (5,741)
Credit losses and other | (7,543) | (3,380)
Credit recoveries and other | 12,449 | 298
Adjustment associated with Sasol Acquisition | 0 | 0
Foreign currency gain | 889 | 119
Balance at end of period | (6,029) | (8,704)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |
Balance at beginning of period | $ (3,120) | 0
Balance at end of period |  | $ (3,120)

X
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