Quarterly report pursuant to Section 13 or 15(d)

Revenue from Contracts with Customers - Narrative (Details)

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Revenue from Contracts with Customers - Narrative (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable $ 21,333 $ 34,910
Trade Accounts Receivable    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable $ 15,604 $ 34,518