Employee Benefit Plans	12 Months Ended
Dec. 31, 2021
Postemployment Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans We maintain defined contribution retirement plans for our employees. We established a 401(k) Plan for our U.S. employees and a defined benefit pension plan for our U.K. employees by which participants may defer taxation on a portion of their earnings, subject to a maximum amount under each applicable plan. We may make discretionary matching contributions to the plans on behalf of participants in any plan year. Any discretionary matching contributions made on behalf of participants become immediately vested and non-forfeitable to the participant. Total expense recognized by us for discretionary matching contributions made in 2021, 2020 and 2019 was $2.5 million, $1.2 million, and $0.5 million, respectively.

The entire disclosure for postemployment benefits, which may include supplemental unemployment benefits, obligations recognized for all types of benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement. Disclosure may also include discussion that an obligation for postemployment benefits is not accrued in accordance with regulation only because the amount cannot be reasonably estimated.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 712
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6410195&loc=d3e80090-111668

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 712
-URI http://asc.fasb.org/topic&trid=2197446

Name:	us-gaap_PostemploymentBenefitsDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration