Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

v3.10.0.1
Summary of Significant Accounting Policies (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Accounting Policies [Abstract]      
Amortization period of deferred sales incentive compensation 5 years    
Allowance for doubtful accounts receivable, current $ 826 $ 407  
Impairment to investments 0 0 $ 734
Impairments of internally developed software $ 0 0 0
Number of reporting units 2    
Goodwill impairment charges $ 0 0 0
Intangible asset impairment charges 0 0 0
Sales and use tax liability 8,643 8,522  
Non-income tax receivable 5,246 2,704  
Sales tax benefit 1,176 (345) (6,229)
Sales and use tax, interest $ 130 $ 244 $ 914