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Commitment and Contingencies - Leases (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
item
Dec. 31, 2014
USD ($)
item
Dec. 31, 2013
USD ($)
As Lessor      
2016 $ 10,411    
2017 10,411    
2018 10,411    
2019 10,411    
2020 9,255    
2021 and thereafter 5,022    
Total future minimum lease payments 55,921    
As Lessee      
2016 11,773    
2017 11,794    
2018 11,577    
2019 10,386    
2020 9,249    
2021 and thereafter 5,503    
Total future minimum lease payments 60,282    
Rental expense for all operating lease 6,200 $ 1,500 $ 769
Prepaid Rent And Security Deposit 12,100 0  
Cash received for future services 15,100    
Short term portion of cash received 2,600    
Aggregate sale price in sale-leaseback transaction     $ 4,500
Cash received in sale-leaseback transaction 2,400 2,400  
Amount receivable under sale-leaseback transaction 74 $ 66  
Cash held in escrow deposit 46,800    
Letter of credit with Silicon Valley Bank $ 1,000    
Accounts receivable. | Credit risk | Customers      
Customer Concentration      
Number of customers | item 2 4  
Concentration risk (as a percent) 50.90% 69.90%  
Accounts receivable. | Credit risk | Customer one      
Customer Concentration      
Concentration risk (as a percent) 38.50% 30.20%  
Accounts receivable. | Credit risk | Customer two      
Customer Concentration      
Concentration risk (as a percent) 12.40% 16.00%  
Accounts receivable. | Credit risk | Customer three      
Customer Concentration      
Concentration risk (as a percent)   13.40%  
Accounts receivable. | Credit risk | Customer four      
Customer Concentration      
Concentration risk (as a percent)   10.30%  
Revenues. | Credit risk | Customers      
Customer Concentration      
Concentration risk (as a percent)   37.20% 33.20%
Revenues. | Credit risk | Walmart      
Customer Concentration      
Concentration risk (as a percent) 56.70% 24.10%  
Revenues. | Credit risk | Volkswagen      
Customer Concentration      
Concentration risk (as a percent)   13.10%  
Revenues. | Credit risk | Mercedes-Benz      
Customer Concentration      
Concentration risk (as a percent)     11.60%
Revenues. | Credit risk | Procter & Gamble      
Customer Concentration      
Concentration risk (as a percent)     11.20%
Revenues. | Credit risk | Lowe's      
Customer Concentration      
Concentration risk (as a percent)     10.40%