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Note 3 - Revenues (Details Textual) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Contract with Customer, Asset, after Allowance for Credit Loss, Total $ 0 $ 0
Revenue, Remaining Performance Obligation, Amount $ 561,300 $ 504,800
Revenue Remaining Performance Obligation, Current Percentage 97.00% 97.00%
Contract with Customer, Liability, Noncurrent $ 88,300 $ 86,800