Operating Leases - Operating Leases, Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Right-of-use assets, net	$ 1,430	$ 434
Current lease obligations	172	44
Non-current lease obligations	1,280	389
Total lease liabilities	$ 1,452	$ 433