Restatement of Previously Issued Unaudited Interim Condensed Consolidated Financial Statements (Details 8) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable, net		$ 12,742	$ 24,419
Total current assets	$ 49,537	59,131	92,156
Total assets	186,779	184,585	193,532
Accrued expenses	9,269	8,101	9,166
Total current liabilities	18,040	18,696	18,875
Total liabilities	148,067	139,832	135,124
Total liabilities and stockholders' equity	186,779	184,585	193,532
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable, net		18,143	27,272
Total current assets	49,688	64,532	95,009
Total assets	186,667	189,986	196,385
Accrued expenses		13,502	12,019
Total current liabilities	17,923	24,097	21,728
Total liabilities	147,544	145,233	137,977
Total liabilities and stockholders' equity	186,667	189,986	196,385
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable, net		5,401	2,853
Total current assets	(151)	5,401	2,853
Total assets	112	5,401	2,853
Accrued expenses		5,401	2,853
Total current liabilities	117	5,401	2,853
Total liabilities	523	5,401	2,853
Total liabilities and stockholders' equity	$ 112	$ 5,401	$ 2,853