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STOCKHOLDERS' EQUITY - Summary of Stock Option Activity (Details) - Hyperfine Plan | 6 Months Ended
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Jun. 30, 2025 shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] |  |
Number of Options, Beginning balance | 18,396,536 |
Number of Options, Granted | 430,917 | [1],[2],[3]
Number of Options, Exercised | (74,140) |
Number of Options, Forfeited / Cancelled / Expired | (1,736,748) |
Number of Options, Ending balance | 17,016,565 |
[1] | Includes a grant of non-qualified stock options to purchase 81,817 shares of the Company’s Class A common stock granted to Mr. Wolterman, the new chairperson of the Company’s board of directors, effective as of June 5, 2025, which vest on the date of the Company’s next regular annual stockholders meeting, subject to Mr. Wolterman’s continued service to the Company through the vesting date. During the vesting term of the option, Mr. Wolterman will not receive cash compensation for his service as chairperson of the board of directors.
[2] | Consists of new hire employee grants of stock options to purchase 111,500 shares of the Company's Class A common stock. The grants vest 25% on the first anniversary date of the grant with the remainder vesting equally over the remaining 36 months, subject to the employee’s continued service to the Company through the applicable vesting dates.
[3] | Includes the annual equity grants to three of the Company’s nonemployee directors of non-qualified stock options to purchase 79,200 shares of the Company’s Class A common stock, effective as of May 20, 2025, for an aggregate of stock options to purchase 237,600 shares of the Company’s Class A common stock. The grants will vest on the date of the Company's next regular annual stockholders meeting, subject to the directors’ continued service to the Company through the vesting date. The previous chairperson of the Company’s board of directors and one of the nonemployee directors chose to voluntarily forfeit their 2025 annual equity grants.

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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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