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Note 2 - Acquisitions (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 01, 2021
Sep. 01, 2021
Jul. 02, 2021
Jun. 01, 2021
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Payments to Acquire Businesses, Net of Cash Acquired, Total         $ 999 $ (0)  
Goodwill, Ending Balance         1,412,187   $ 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         436,995    
Goodwill, Ending Balance         265,558   265,558
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   $ 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]              
Payments to Acquire Businesses, Net of Cash Acquired, Total $ 735,632            
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill         801,036    
Goodwill, Ending Balance         $ 245,636   245,636
Business Combination, Consideration Transferred, Total $ 735,632            
Other 2021 Acquisitions [Member]              
Payments to Acquire Businesses, Net of Cash Acquired, Total             $ 30,086