Correction of Previously Issued Consolidated Financial Statements - Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable	$ 892	$ (711)
Accounts payable and accrued expenses	$ (95)	(6,423)
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable		4,690
Accounts payable and accrued expenses		(11,824)
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable		(5,401)
Accounts payable and accrued expenses		$ 5,401