Revenue - Contract Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Accounts receivable	$ 21,544	$ 21,760
Capitalized costs to obtain a contract	1,919	1,976
Contract liabilities	$ 32,408	$ 35,183

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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