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Commitments and Contingencies - Hosting, Telecommunications Usuage and Maintenance Services (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Hosting Services  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2017 $ 1,109
2018 13
2019 0
Total future minimum payment 1,122
Telecommunication Usage Services  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2017 1,952
2018 302
2019 43
Total future minimum payment 2,297
Equipment Maintenance Services  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2017 517
2018 83
2019 29
Total future minimum payment $ 629