Commitments and Contingencies - Schedule of Future Minimum Payments Under Non-cancelable Data Center Arrangements (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Leases Future Minimum Payments Due [Abstract]
2019 (remainder of year)	$ 56
2020	76
Total	$ 132

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