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Note 2 - Summary of Accounting Policies - Reconciliation of Contingent Consideration (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Beginning balance, January 1, 2021		$ 5,888
Present value interest accretion		862
Payments		(3,750)	$ (4,000)	$ (5,550)
Ending balance, December 31, 2021		146,759	5,888
Contingent Consideration Liability [Member]
Beginning balance, January 1, 2021		5,888
Purchase price contingent consideration (1)	[1]	149,761
Changes in fair value		(6,002)
Payments		(3,750)
Ending balance, December 31, 2021		$ 146,759	$ 5,888
[1] The increase in the contingent consideration liability is due to the contingent consideration associated with the acquisitions of Chilicon, Off Grid Energy, and ecobee. Refer to Note 3, "Acquisitions," to the consolidated financial statements for further information.

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- Definition

The amount of increase due to acquisition in contingent consideration arrangements from business combinations.

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The amount of increase due to present value interest accretion in contingent consideration arrangements from business combinations.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability up to amount recognized at acquisition date, including, but not limited to, measurement period adjustment and less amount paid soon after acquisition date.

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