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Note 2 - Summary of Accounting Policies - Reconciliation of Contingent Consideration (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Beginning balance, January 1, 2022 $ 146,759    
Changes in fair value (18,339) $ (206) $ (7,145)
Ending balance, December 31, 2022 81,533 146,759  
Contingent Consideration Liability [Member]      
Beginning balance, January 1, 2022 146,759    
Changes in fair value (231)    
Payment of contingent consideration (1) [1] (63,800)    
Present value interest accretion 1,974    
Currency translation (3,169)    
Ending balance, December 31, 2022 $ 81,533 $ 146,759  
[1] Includes payments of $16,135 in cash for the Off Grid acquisition, $47,123 in shares of common stock for the ecobee acquisition, and $542 in cash for the ecobee acquisition. The payment of common stock is accounted for as a non-cash item in the consolidated statement of cash flows.