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Stock-based compensation - Preferred Stock Warrants (Details) - $ / shares	Sep. 30, 2022	Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2020	Apr. 30, 2020
Class of Warrant or Right [Line Items]
Number of warrants outstanding (in shares)	17,920,898
Weighted average exercise price (in usd per share)	$ 7.91
Preferred stock warrants
Class of Warrant or Right [Line Items]
Number of warrants outstanding (in shares)	3,247,637
Weighted average exercise price (in usd per share)				$ 2.16
Number exercisable (in shares)	1,299,055
Preferred stock warrants | DWave System [Member]
Class of Warrant or Right [Line Items]
Number of warrants outstanding (in shares)		3,247,637	1,100,000	3,247,637
Weighted average exercise price (in usd per share)				$ 1.92
Number exercisable (in shares)		1,299,055
Preferred stock warrants | Weighted average
Class of Warrant or Right [Line Items]
Weighted average exercise price (in usd per share)	$ 1.92
Preferred stock warrants | Weighted average | DWave System [Member]
Class of Warrant or Right [Line Items]
Weighted average exercise price (in usd per share)		$ 1.92
Common Stock Warrants [Member] | DWave System [Member]
Class of Warrant or Right [Line Items]
Number of warrants outstanding (in shares)		617,972			617,972
Weighted average exercise price (in usd per share)		$ 1.75			$ 1.75
Number exercisable (in shares)		617,972

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Class Of Warrant Or Right, Exercisable

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

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