Operating Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset, net	$ 745	$ 745		$ 0
Operating lease liability	745	745
Estimated incremental borrowing rate			6.00%
Lease and rent expense	300	800
Operating lease, payments	$ 300	$ 800
Weighted average remaining lease term	8 months 27 days	8 months 27 days
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset, net			$ 1,500
Operating lease liability			$ 1,500