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Common stock and non-redeemable convertible preferred stock - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021 | Aug. 05, 2022 | Dec. 31, 2020
Common stock and nonredeemable convertible preferred stock [Line Items] |  |  |  |  |
Common Stock, Par or Stated Value Per Share | $ 0.0001 |  | $ 0.0001 |  |
Common Stock, Shares, Issued | 110,377,357 |  | 2,817,498 |  |
Common Stock, Shares, Outstanding | 110,377,357 |  | 2,817,498 | 110,007,972 |
Proceeds from issuance of common stock | $ 40,000 | $ 0 |  |  |
D-Wave Systems Inc. [Member] |  |  |  |  |
Common stock and nonredeemable convertible preferred stock [Line Items] |  |  |  |  |
Dividends Declared |  |  | $ 0 |  | $ 0
Common Stock, Par or Stated Value Per Share |  |  | $ 0 |  | $ 0
Common Stock, Shares, Issued |  |  | 3,166,949 |  | 3,061,746
Common Stock, Shares, Outstanding |  |  | 3,166,949 |  | 3,061,746
Preferred Stock, Voting Rights |  |  | 2/3 |  |
Common Stock Convertible Conversion Price |  |  | 1.75% |  |
ClassB2 Common share [Member] | D-Wave Systems Inc. [Member] |  |  |  |  |
Common stock and nonredeemable convertible preferred stock [Line Items] |  |  |  |  |
Common Stock, Shares, Issued |  |  | 3,166,948 |  | 3,061,745
Common Stock, Shares, Outstanding |  |  | 3,166,948 |  | 3,061,745
Common Stock, Conversion Basis |  |  | one-for-one basis |  |
Qualified IPO [Member] | New York Stock Exchange [Member] | D-Wave Systems Inc. [Member] |  |  |  |  |
Common stock and nonredeemable convertible preferred stock [Line Items] |  |  |  |  |
Proceeds from issuance of common stock |  |  | $ 40,000 |  |
Qualified IPO [Member] | New York Stock Exchange [Member] | ClassB2 Common share [Member] | D-Wave Systems Inc. [Member] |  |  |  |  |
Common stock and nonredeemable convertible preferred stock [Line Items] |  |  |  |  |
Proceeds from issuance of common stock |  |  | $ 250,000 |  |

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