Income Taxes - Uncertainties in Income Tax Provision Liability (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) item	Dec. 31, 2019 USD ($)
Unrecognized tax benefits
Unrecognized tax benefits, beginning balance	$ 528
Gross increases based on current period tax positions	411	$ 528
Gross decreases based on tax positions of the prior periods	(102)
Unrecognized tax benefits, ending balance	$ 837	$ 528
Number of income tax examinations pending | item	0