Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Other Current Assets:
Lease receivable, net	$ 29	$ 29
Deferred acquisition costs	40	46
Prepaid expenses	10,133	3,664
Interest receivable	539	966
Total Other Current Assets	10,741	4,705
Other Assets:
Lease receivable, net	16	16
Deferred acquisition costs	30	35
Security deposits	507	507
Total Other Assets	$ 553	$ 558