v3.6.0.2
Accounts receivables, net and other receivables (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accounts receivables, net and other receivables      
Trade receivables, net of allowances $ 39,404 $ 41,736  
Unbilled access fees 21 1,654  
Unbilled platform service arrangements 3,553 162  
Accounts receivable, net 42,978 43,552  
Unbilled access fees 867 360  
Unbilled platform service arrangements 694 3,472  
Non-current other receivables 1,561 3,832  
Allowance for doubtful accounts      
Balance at the beginning of the year 605 394 $ 345
Additions charged to operations 116 304 191
Deductions from reserves, net (279) (93) (142)
Balance at the end of the year $ 442 $ 605 $ 394