Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jan. 01, 2019
Leases
Operating lease liabilities	$ 1,872
ASU 2016-02
Leases
Election of practical expedients package	true
ASU 2016-02 | Adjustment
Leases
ROU assets		$ 2,000
Operating lease, ROU assets, Statement of Financial Position		us-gaap:PropertyPlantAndEquipmentNet
Operating lease liabilities		$ 2,000
Operating lease liability, Statement of Financial Position		us-gaap:OtherLiabilitiesNoncurrent
Estimated incremental borrowing rate		9.80%