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Basis of presentation and Summary of Significant Accounting Policies - Other Narrative (Details) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 05, 2022 USD ($) shares | Feb. 07, 2022 USD ($) | Sep. 30, 2022 USD ($) board_member $ / shares shares | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) SEGMENT board_member $ / shares shares | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) SEGMENT $ / shares | Dec. 31, 2021 CAD ($) SEGMENT | Dec. 31, 2020 USD ($) $ / shares | Jun. 16, 2022 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2021 CAD ($)
Accumulated deficit |  |  | $ 363,136,000 |  | $ 363,136,000 |  | $ 325,268,000 |  |  |  |  |
Working capital deficit |  |  | (11,700,000) |  | (11,700,000) |  |  |  |  |  |  |
Net income (loss) |  |  | $ (13,053,000) | $ (4,209,000) | (37,868,000) | $ (17,705,000) |  |  |  |  |  |
Net cash outflows from operations |  |  |  |  | $ (34,270,000) | (27,615,000) |  |  |  |  |  |
Common stock, par value (in usd per share) | $ / shares |  |  | $ 0.0001 |  | $ 0.0001 |  | $ 0.0001 |  |  |  |  |
Number of reportable segments | SEGMENT |  |  |  |  | 1 |  |  |  |  |  |  |
Foreign currency transaction gain |  |  | $ 956,000,000 | 29,000,000 | $ 1,322,000,000 | 538,000,000 |  |  |  |  |  |
Cash and cash equivalents |  |  | 13,764,000 |  | 13,764,000 |  | $ 9,483,000 |  |  |  |  |
Marketable investments, fair value |  |  | 1,200,000 |  | 1,200,000 |  | 279,000,000,000 |  |  |  |  | $ 10.2
Marketable investments |  |  | 1,200,000 |  | 1,200,000 |  | 5,000,000 |  |  |  |  |
SR&ED investment tax credit |  |  | $ 100,000 | $ 500,000 | $ 1,000,000 | $ 1,200,000 |  |  |  |  |  |
Number of board members | board_member |  |  | 7 |  | 7 |  |  |  |  |  |  |
Cash |  |  | $ 13,800,000 |  | $ 13,800,000 |  | 9,500,000 |  |  |  |  |
Cash Acquired Through Reverse Recapitalization And Proceeds From Issuance Of Private Placement | $ 49,000,000 |  |  |  |  |  |  |  |  |  |  |
ELOC, right to sell common stock |  |  |  |  |  |  |  |  |  | $ 150,000,000 |  |
Equity line of credit ownership restriction percentage |  |  |  |  |  |  |  |  |  | 9.90% |  |
Equity line of credit floor stock price |  |  |  |  |  |  |  |  |  | 1.00% |  |
Class of warrant or right cap on issuable number of shares ratio |  |  | 0.361 |  | 0.361 |  |  |  |  |  |  |
Class Of Warrant Or Right Quoted Price | shares |  |  | 0.31 |  | 0.31 |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding | shares |  |  | 17,920,898 |  | 17,920,898 |  |  |  |  |  |  |
Revenue from Contract with Customer Benchmark [Member] | Customer A [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  | 15.00% | 15.00% | 13.00% | 13.00% |  |  |  |  |  |
Revenue from Contract with Customer Benchmark [Member] | Customer B [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  | 11.00% | 11.00% | 13.00% | 12.00% |  |  |  |  |  |
Revenue from Contract with Customer Benchmark [Member] | Customer C [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  | 10.00% | 0.00% |  |  |  |  |  |  |  |
Revenue from Contract with Customer Benchmark [Member] | Two Customers [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 13.00% |  |  |  |  |  |  |
D Wave Systems Existing Stockholders [Member] |  |  |  |  |  |  |  |  |  |  |  |
Voting Interest |  |  | 91.00% |  | 91.00% |  |  |  |  |  |  |
Board Member Designated By D P C M Capital Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |
Number of board members | board_member |  |  | 1 |  | 1 |  |  |  |  |  |  |
Board Member Retained From D Wave Systems Board [Member] |  |  |  |  |  |  |  |  |  |  |  |
Number of board members | board_member |  |  | 3 |  | 3 |  |  |  |  |  |  |
Independent Board [Member] |  |  |  |  |  |  |  |  |  |  |  |
Number of board members | board_member |  |  | 3 |  | 3 |  |  |  |  |  |  |
Equity Line Of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) | shares | 127,180 |  |  |  | 381,540 |  |  |  |  |  |  |
DWave System [Member] |  |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  |  |  | 325,268,000 |  | $ 293,723,000 |  |  |
Working capital deficit |  |  |  |  |  |  | 8,900,000 |  |  |  |  |
Net income (loss) |  |  |  |  |  |  | (31,545,000) |  | (10,019,000) |  |  |
Net cash outflows from operations |  |  |  |  |  |  | (34,800,000) |  | $ (29,287,000) |  |  |
Amount of financing |  | $ 40,000,000 |  |  |  |  | $ 25,100,000 | $ 40.0 |  |  |  |
Common stock, par value (in usd per share) | $ / shares |  |  |  |  |  |  | $ 0 |  | $ 0 |  |  |
Deferred offering costs |  |  |  |  |  |  | $ 1,200,000 |  | $ 0 |  |  |
Number of reportable segments | SEGMENT |  |  |  |  |  |  | 1 | 1 |  |  |  |
Foreign currency transaction gain |  |  |  |  |  |  | $ 608,000 |  | 623,000 |  |  |
Cash and cash equivalents |  |  |  |  |  |  | 9,483,000 |  | 21,335,000 |  |  |
Financing received |  |  |  |  |  |  | 25,100,000 | $ 32.0 |  |  |  |
Marketable investments, fair value |  |  |  |  |  |  | 1,200,000 |  | 279,000,000 |  |  | $ 10.2
Marketable investments |  |  |  |  |  |  | 1,200,000 |  | 5,000,000 |  |  |
SR&ED investment tax credit |  |  |  |  |  |  | 1,500,000 |  | 2,100,000 |  |  |
Allowance for doubtful accounts receivable current |  |  |  |  |  |  | 0 |  | 0 |  |  |
Impairment of long-lived assets to be disposed of |  |  |  |  |  |  | 0 |  | 0 |  |  |
capitalized contract fulfillment costs |  |  |  |  |  |  | 0 |  | 0 |  |  |
Marketing and advertising expense |  |  |  |  |  |  | $ 887,000,000 |  | $ 1,000,000 |  |  |
DWave System [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer A [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  | 15.00% | 15.00% | 22.00% |  |  |
DWave System [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer B [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  | 13.00% | 13.00% | 17.00% |  |  |
DWave System [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer C [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  | 12.00% | 12.00% | 10.00% |  |  |
DWave System [Member] | Old D-Wave [Member] |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  | 75.00% |  |  |  |  | 75.00%
DWave System [Member] | Strategic Innovation Fund (SIF) Government loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Interest expense, borrowings |  |  |  |  |  |  | $ 7,200,000 |  |  |  |  |
DWave System [Member] | Technology Partnership of Canada (TPC) Government Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Interest expense, borrowings |  |  |  |  |  |  |  |  | $ 12,000,000 |  |  |
DWave System [Member] | Venture Loan Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  |  |  |  |  |  | $ 25,000,000 |

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