Leases - Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease asset	$ 2,192	$ 2,415
Finance lease assets	639	378
Total lease assets	2,831	2,793
Current operating lease liabilities	403	374
Current finance lease liabilities	259	145
Non-current operating lease liabilities	1,629	1,836
Non-current finance lease liabilities	380	233
Total lease liabilities	$ 2,671	$ 2,588