Balance Sheet Components, Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]
Accrued variable compensation	$ 31,244	$ 27,527
Deferred revenues	8,167	9,422
Estimated fair value of contingent consideration liability	21,644	33,943
Current operating lease liabilities	11,543	10,321
Deferred employer FICA payments	0	5,523
Payroll related costs	9,523	5,738
Professional fees	1,727	736
Accrued medical claims expense	2,605	2,405
Accrued IT expenses	1,776	1,964
Other current liabilities	5,648	5,688
Total	$ 93,877	$ 103,267