Income Taxes - Components of Deferred Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Deferred tax expense:
Federal	$ 9,855	$ 8,523
State	2,711	1,569
Foreign	583	(200)
Total deferred income taxes	13,149	9,892
Change in deferred tax valuation allowance	(13,149)	(9,892)
Net deferred income tax	$ 0	$ 0