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Note 3 - Revenue Recognition (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Contract with Customer, Liability $ 12,500   $ 12,500   $ 3,000
Contract with Customer, Liability, Revenue Recognized $ 1,900 $ 0 $ 3,100 $ 0