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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Commitments and Contingencies Litigation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 65,690	$ 63,146	$ 185,406	$ 160,222
Accounts receivable, net	58,749		58,749		$ 18,989
Pending Litigation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	16,343		31,893
Accounts receivable, net	$ 35,045		$ 35,045