Commitments and Contingencies - Hosting Services Agreement (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Future minimum payments committed under the hosting agreement
2018 (remaining six months)	$ 9,657
2019	15,333
2020	10,667
Total	$ 35,657

Amount of contractual obligation due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	us-gaap_ContractualObligationDueInSecondYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant