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Stockholders' Equity - Restricted Stock Units - Intrinsic Value (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract]
Intrinsic value of restricted stock units vested	$ 1.4

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- Definition

Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options.

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