Operating Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset, net	$ 989	$ 989
Operating lease liability	989	989
Estimated incremental borrowing rate			6.00%
Lease and rent expense	300	600
Operating lease, payments	$ 300	$ 600
Weighted average remaining lease term	1 year	1 year
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