Other Significant Balance Sheet Accounts - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]
Payable to a broker	$ 20,092
Contingent consideration	8,500
Payroll liabilities	8,380	$ 5,314
Operating lease liabilities, short term	1,830	267
Due to related parties	634	409
Sales tax payable and other	467	2,538
Finance lease liabilities, short term	16
Total	$ 39,919	$ 8,528