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Note 3 - Acquisitions (Details Textual) - USD ($) $ in Thousands |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 01, 2021 | Sep. 01, 2021 | Jul. 02, 2021 | Jun. 01, 2021 | Oct. 07, 2020 | Apr. 26, 2019 | Mar. 12, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  |  |  |  |  |  | $ 713,471 | $ 64,797 | $ 112,001
Goodwill, Ending Balance |  |  |  |  |  |  |  |  |  | 1,409,674 | 855,228 | 805,284
Business Combination, Contingent Consideration, Liability, Total |  |  |  |  |  |  |  |  |  | 146,759 | 5,888 |
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 |  |  |  | 437,864 |  |  |  |  |  |  |  |
Goodwill, Ending Balance |  |  |  | $ 266,427 |  |  |  |  |  | 266,427 |  |
Acquisition of Chilicon [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill |  |  | $ 69,992 |  |  |  |  |  |  |  |  |
Goodwill, Ending Balance |  |  | 37,492 |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  | $ 61,129 |  |  |  |  |  |  |  |  |
Acquisition of Off Grid Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  | $ 53,438 |  |  |  |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill |  | 52,565 |  |  |  |  |  |  |  |  |  |
Goodwill, Ending Balance |  | 18,020 |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total |  | $ 29,054 |  |  |  |  |  |  |  |  |  |
ecobee Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill | $ 795,613 |  |  |  |  |  |  |  |  |  |  |
Goodwill, Ending Balance | 231,213 |  |  |  |  |  |  |  |  | 231,213 |  |
Business Combination, Consideration Transferred, Total | $ 734,638 |  |  |  |  |  |  |  |  |  |  |
Other 2021 Acquisitions [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  |  |  |  |  |  | 30,086 |  |
Acquisition of Enbala [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  | $ 41,982 |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill |  |  |  |  | 46,338 |  |  |  |  |  |  |
Goodwill, Ending Balance |  |  |  |  | $ 27,038 |  |  |  |  |  |  |
Other 2020 Acquisitions [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  |  |  |  | $ 22,958 |  |  |  |
Pika [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  |  | $ 49,068 |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill |  |  |  |  |  | 58,196 |  |  |  |  |  |
Goodwill, Ending Balance |  |  |  |  |  | $ 19,896 |  |  |  |  |  |
Neurio [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  |  |  | $ 59,071 |  | $ 7,922 |  |  |
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill |  |  |  |  |  |  | 58,762 |  |  |  |  |
Goodwill, Ending Balance |  |  |  |  |  |  | $ 17,862 |  |  |  |  |
All Acquisitions [Member] |  |  |  |  |  |  |  |  |  |  |  |
Proforma Amortization of Intangible Assets |  |  |  |  |  |  |  |  |  | $ 63,524,000 | $ 78,840,000 | $ 83,100,000

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