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Note 1 - Organization and Accounting Policies - Analysis of Change in Allowance for Bad Debt (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 01, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Balance at beginning of period | $ (8,704) | $ (12,832) | $ (8,704) | $ (6,135) | $ (8,704) | $ (5,741)
Credit loss charges and other, net of receipts |  | (680) |  | (571) | (1,615) | (1,063)
Foreign currency gain (loss) |  | (7) |  | 317 | (80) | 415
Balance at end of period |  | (13,519) | (12,832) | (6,389) | (13,519) | (6,389)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |
Balance at beginning of period | (3,120) | $ 0 | (3,120) | $ 0 | $ (3,120) | $ 0
Credit loss charges and other, net of receipts | (3,100) |  |  |  |  |
Balance at end of period | $ (3,100) |  | $ 0 |  |  |

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