Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Net operating tax loss and capital loss carryforwards	$ 15,223	$ 5,632
Accrued expenses	66	348
Stock-based compensation	521	84
Start up cost	12,320	4,806
Total deferred tax asset	28,130	10,870
Less valuation allowance	(28,130)	(10,870)
Net deferred tax asset	$ 0	$ 0