Correction to Previously Issued Unaudited Interim Condensed Consolidated Financial Statements (Details 2) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable, net		$ 12,742	$ 21,226
Total current assets	$ 51,378	59,131	76,046
Total assets	192,882	184,585	190,666
Accrued expenses	10,437	8,101	12,572
Total current liabilities	39,081	18,696	21,437
Total liabilities	157,182	139,832	140,139
Total liabilities and stockholders' equity	$ 192,882	184,585	190,666
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable, net		18,143	25,026
Total current assets		64,532	79,846
Total assets		189,986	194,466
Accrued expenses		13,502	16,372
Total current liabilities		24,097	25,237
Total liabilities		145,233	143,939
Total liabilities and stockholders' equity		189,986	194,466
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable, net		5,401	3,800
Total current assets		5,401	3,800
Total assets		5,401	3,800
Accrued expenses		5,401	3,800
Total current liabilities		5,401	3,800
Total liabilities		5,401	3,800
Total liabilities and stockholders' equity		$ 5,401	$ 3,800