Restatement of Previously Issued Unaudited Interim Condensed Consolidated Financial Statements (Details 9) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable	$ (4,227)	$ (4,008)
Accounts payable and accrued expenses	(4,086)	892
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable	1,023	(5,530)
Accounts payable and accrued expenses	(9,604)	2,414
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable	(5,250)	(1,522)
Accounts payable and accrued expenses	$ 5,518	$ 1,522