Lease - Future Minimum Lease Payments (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Leases [Abstract]
Within one year	$ 332
After one but within two years	289
After two but within three years	198
After three but within four years	202
After four but within five years	154
Total undiscounted cash flows	1,175
Discount on cash flows	(211)
Total lease liability	$ 964