Revenue - Narrative (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue	$ 34,570,000	$ 5,385,000	$ 5,177,000
Deferred revenue related to collaboration	3,200,000	3,900,000
Illumina, Cambridge Ltd.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue	30,000,000
Revenue agreement, initial transaction price		0
Service And Other Revenues
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue	$ 1,400,000	$ 1,500,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance period	3 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Illumina, Cambridge Ltd.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue agreement, initial transaction price	$ 30,000,000
Remaining performance period	9 years