Quarterly report pursuant to Section 13 or 15(d)

Credit Risk and Concentrations (Details)

v3.10.0.1
Credit Risk and Concentrations (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Concentration Risk [Line Items]        
Net revenues $ 1,828 $ 15,096 $ 3,922 $ 28,578
Customer concentration risk [Member] | Customer A [Member]        
Concentration Risk [Line Items]        
Net revenues $ 319 $ 644
Concentration risk, percentage 17.00% 16.00%
Customer concentration risk [Member] | Customer B [Member]        
Concentration Risk [Line Items]        
Net revenues $ 211 $ 512
Concentration risk, percentage 12.00% 13.00%
Customer concentration risk [Member] | Customer C [Member]        
Concentration Risk [Line Items]        
Net revenues $ 195 $ 422
Concentration risk, percentage 11.00% 11.00%
Customer concentration risk [Member] | Customer D [Member]        
Concentration Risk [Line Items]        
Net revenues $ 3,648 $ 5,264
Concentration risk, percentage 24.00% 18.00%