Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Intellectual property
Intellectual property	$ 700	$ 700
Less: Accumulated amortization	(428)	(194)
Total, net	272	506
Amortization expense	$ 234	$ 194	$ 0