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Commitments and Contingencies (Details) - Thermometer Patent Litigation $ in Millions		1 Months Ended
	May 31, 2018 USD ($)	Mar. 31, 2018 Patent	Jun. 30, 2016 USD ($)	Jan. 31, 2016 USD ($) model Patent
Litigation
Commitments and contingencies
Number of models | model				2
Charge including legal fees and other related expenses				$ 17.8
Amount of additional pre-judgment compensation			$ 1.5
Number of verdicts of infringement of patents reversed | Patent		1		2
Settled Litigation
Commitments and contingencies
Settlement payment	$ 15.0

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- Definition

Amount of additional judgment or settlement awarded to (against) the entity in respect of litigation including legal fees and other expenses.

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Amount of judgment or settlement awarded to (against) the entity in respect of litigation including legal fees and other expenses.

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- Definition

Represents the number of models of a product in a litigation case.

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The number of verdicts of infringement of patents that were reversed.

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Amount awarded to other party in judgment or settlement of litigation.

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