Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

v3.8.0.1
Summary of Significant Accounting Policies (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2017
USD ($)
item
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Significant accounting policies                      
Estimated period of customer relationship                 5 years    
Cost of revenues                      
Assets under management or administration                 $ 194,894 $ 160,842 $ 152,573
Subscription and licensing                 19,818 16,113 7,785
Professional services and other                 4,325 3,635 951
Total                 219,037 180,590 161,309
Changes in allowance for doubtful accounts                      
Allowance for doubtful accounts $ 407       $ 242       407 242 221
Impairment to investments                 0 734 0
Impairments of internally developed software                 $ 0 0 0
Number of reporting units | item                 2    
Goodwill impairment charges                 $ 0 0 0
Intangible asset impairment charges                 0 0 0
Sales and use tax liability 8,522       10,108       8,522 10,108  
Sales and use tax expense                 345 6,229  
Sales and use tax, interest                 244 914  
Sales and use tax receivable 2,704       3,879       2,704 3,879  
Total revenues $ 182,862 $ 175,614 $ 167,417 $ 157,786 $ 155,480 $ 149,155 $ 141,708 $ 131,821 $ 683,679 $ 578,164 $ 420,919