Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Allowance for doubtful accounts receivables- current	$ 2,769	$ 3,030
Related party accounts receivable- current	149	169
Related party accounts payable- current	3,808	3,200
Related party accrued expenses and other current liabilities	$ 785	$ 52
Preferred stock, par value ( in dollar per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, share issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per shares)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	101,606,400	100,428,656
Common stock, shares outstanding (in shares)	101,606,400	100,428,656