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v3.21.2

BUSINESS COMBINATION (Details) |  |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 10, 2021 USD ($) $ / shares shares | Jun. 09, 2021 shares | Sep. 30, 2021 USD ($) Vote | Feb. 18, 2021 USD ($) | Dec. 31, 2020 USD ($)
Business Combination [Abstract] |  |  |  |  |
Increase in cash | $ 540,276,000 |  |  |  |
Warrant liabilities | 11,618,000 |  | $ 8,176,000 |  | $ 0
PIPE Investors [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Increase in cash | $ 425,001,000 |  |  |  |
Class A Common Stock [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Exchange Ratio |  |  | 0.7975 |  |
Class B Common Stock [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Exchange Ratio |  |  | 0.7975 |  |
HighCape [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Exchange Ratio |  |  |  | 0.7975 |
Base amount included in numerator of Exchange Ratio calculation |  |  |  | $ 810,000,000 |
Expense threshold included in numerator of Exchange Ratio calculation |  |  |  | 8,025,000 |
Denominator included in Exchange Ratio calculation |  |  |  | $ 10.00 |
Percentage of combined voting power held by Sponsor | 80.40% |  |  |  |
Increase in cash | $ 115,275,000 |  |  |  |
Transaction costs | 17,824,000 |  |  |  |
Payment of PPP loan, including interest | 1,764,000 |  |  |  |
Payments to redeeming shareholders | 5,712,000 |  |  |  |
Payment to third party service provider | 3,800,000 |  |  |  |
Proceeds on date of Business Combination, excluding warrant liabilities and other insignificant assets and liabilities | 511,176,000 |  |  |  |
Warrant liabilities | 11,618,000 |  |  |  |
Transaction costs expensed |  |  | $ 7,383,000 |  |
Other liabilities and related transaction costs | $ 21,776,000 |  |  |  |
Net equity infusion from the Business Combination |  |  | $ 501,170,000 |  |
HighCape [Member] | Foresite Funds [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Shares outstanding (in shares) | shares |  | 696,250 |  |  |
HighCape [Member] | Initial Stockholders [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Shares outstanding (in shares) | shares |  | 2,178,750 |  |  |
HighCape [Member] | Class A Common Stock [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Votes per share | Vote |  |  | 1 |  |
Shares outstanding (in shares) | shares | 116,463,160 |  |  |  |
HighCape [Member] | Class A Common Stock [Member] | Legacy Quantum-Si Stockholders [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Shares outstanding (in shares) | shares | 59,754,288 |  |  |  |
HighCape [Member] | Class A Common Stock [Member] | PIPE Investors [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Shares issued (in shares) | shares | 42,500,000 |  |  |  |
Share price (in dollars per share) | $ / shares | $ 10.00 |  |  |  |
Shares outstanding (in shares) | shares | 42,500,000 |  |  |  |
HighCape [Member] | Class A Common Stock [Member] | Foresite Funds [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Shares issued (in shares) | shares | 696,250 |  |  |  |
Share price (in dollars per share) | $ / shares | $ 0.001 |  |  |  |
Aggregate gross proceeds | $ 1,000 |  |  |  |
Shares outstanding (in shares) | shares | 696,250 |  |  |  |
HighCape [Member] | Class A Common Stock [Member] | Initial Stockholders [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Shares outstanding (in shares) | shares | 2,178,750 |  |  |  |
HighCape [Member] | Class A Common Stock [Member] | Sponsor [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Shares outstanding (in shares) | shares | 405,000 |  |  |  |
HighCape [Member] | Class A Common Stock [Member] | Public Stockholders [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Shares outstanding (in shares) | shares | 10,928,872 |  |  |  |
Shares redeemed (in shares) | shares | 571,128 |  |  |  |
HighCape [Member] | Class B Common Stock [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Votes per share | Vote |  |  | 20 |  |
Shares outstanding (in shares) | shares | 19,937,500 |  |  |  |
HighCape [Member] | Class B Common Stock [Member] | Minimum [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Percentage of total shares that must be beneficially owned included in sunset provision |  |  | 20.00% |  |
HighCape [Member] | Class B Common Stock [Member] | Sponsor [Member] |  |  |  |  |
Business Combination [Abstract] |  |  |  |  |
Shares forfeited (in shares) | shares |  | 696,250 |  |  |

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- Definition Amount of the denominator included in the calculation of the Exchange Ratio established pursuant to the Business Combination Agreement dated as of February 18, 2021. + References No definition available. + Details
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- Definition Exchange ratio established pursuant to the Business Combination Agreement dated as of February 18, 2021 applied retroactively to reported shares and earnings per share available to holders of the Company's capital stock and equity awards prior to the Business Combination. + References No definition available. + Details
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- Definition Expense threshold included in the numerator of the calculation of the Exchange Ratio established pursuant to the Business Combination Agreement dated as of February 18, 2021. + References No definition available. + Details
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- Definition Amount of increase (decrease) in cash in the post-combination Company's financial position associated with gross proceeds from the equity infusion related to the Business Combination. + References No definition available. + Details
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