Restructuring and Severance Charges (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
Sep. 30, 2019	Mar. 31, 2020	Dec. 31, 2019
Restructuring and Related Activities [Abstract]
Percentage reduction in force	60.00%
Restructuring and severance charges		$ 0	$ 5,600
Expected payments to be incurred in the next 12 months		$ 2,700

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration