v3.6.0.2
Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2016
Accounting Policies [Abstract]  
Schedule of Changes in Allowance for Doubtful Accounts

The following table presents changes in the allowance for doubtful accounts (in thousands):

 

     Year Ended December 31,  
     2014      2015      2016  

Beginning balance

    $ 524       $ 172       $ 686   

Add: bad debt expense

      144         542         1,890   

Less: write-offs, net of recoveries

      (496 )       (28 )       (2 ) 
  

 

 

     

 

 

     

 

 

  

Ending balance

    $ 172       $ 686       $ 2,574   
  

 

 

     

 

 

     

 

 

  

Schedule of Useful lives of PPE

Depreciation is computed using the straight-line method based upon the following estimated useful lives:

 

     Years  

Computer equipment

      2   

Purchased software

      5   

Furniture, fixtures and office equipment

      5   

Leasehold improvements

      *   

 

  * Leasehold improvements are amortized on a straight-line basis over the term of the lease, or the useful life of the assets, whichever is shorter.