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Note 2 - Acquisitions - Proforma Results (Details) - The 2021 Acquisitions [Member] - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Revenue, net | $ 654,233 | $ 546,516
Net earnings | $ 52,689 | $ 25,051
Common Class A [Member] |  |
Earnings per Class A common share - basic and diluted (in dollars per share) | $ 4.01 | $ 1.92
Common Class B [Member] |  |
Earnings per Class A common share - basic and diluted (in dollars per share) | $ 4.24 | $ 2.04

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