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Note 2 - Acquisitions (Details Textual) - USD ($) $ in Thousands |  |  |  |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 01, 2021 | Sep. 01, 2021 | Jul. 02, 2021 | Jun. 01, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  | $ 11,421 | $ 419,017 |
Goodwill, Ending Balance |  |  |  |  | 1,388,051 |  | $ 1,409,674
Acquisition of Deep Sea [Member] |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  | $ 420,700 |  |  |
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill |  |  |  |  | 437,874 |  |
Goodwill, Ending Balance |  |  |  |  | 263,604 |  | 263,604
Acquisition of Chilicon [Member] |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill |  |  |  |  | 70,174 |  |
Goodwill, Ending Balance |  |  |  |  | 36,974 |  |
Business Combination, Consideration Transferred, Total |  |  | $ 61,129 |  |  |  |
Acquisition of Off Grid Energy [Member] |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  | $ 56,949 |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill |  | 56,076 |  |  |  |  |
Goodwill, Ending Balance |  | 21,531 |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total |  | $ 29,054 |  |  |  |  |
Other 2021 Acquisitions [Member] |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total | $ 735,632 |  |  |  |  |  | $ 29,945
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill |  |  |  |  | 798,746 |  |
Goodwill, Ending Balance |  |  |  |  | $ 243,346 |  |

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