Annual report pursuant to Section 13 and 15(d)

Composition of Certain Financial Statement Captions - Schedule of allowance for doubtful accounts (Details)

v3.6.0.2
Composition of Certain Financial Statement Captions - Schedule of allowance for doubtful accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Allowance for Doubtful Accounts      
Balance at Beginning of Period $ 2,165 $ 1,218 $ 1,272
Additions 3,508 2,085 1,064
Write-offs, Net of Recoveries (2,040) (1,138) (1,118)
Balance at End of Period $ 3,633 $ 2,165 $ 1,218