Summary of Significant Accounting Policies - Topic 842 (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
New accounting pronouncements
Operating lease ROU assets	$ 758
Operating lease liability	$ 768
ASU 2016-02 | Adjustment
New accounting pronouncements
Operating lease ROU assets		$ 1,200
Operating lease liability		$ 1,200