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EQUITY INCENTIVE PLAN - Additional Information (Details) |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
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Sep. 26, 2022 $ / shares | Jun. 27, 2022 USD ($) | Apr. 26, 2022 Installment shares | Dec. 31, 2021 USD ($) Option $ / shares shares | Dec. 31, 2022 USD ($) Option shares | Dec. 31, 2022 USD ($) Option $ / shares shares | Dec. 31, 2021 USD ($) Option $ / shares shares | Jul. 29, 2022 shares | Dec. 31, 2020 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option repricing approved date |  | Aug. 24, 2022 |  |  |  |  |  |  |  |
Option repricing effected date |  | Oct. 31, 2022 |  |  |  |  |  |  |  |
Tax benefits related to stock options exercise | $ |  |  |  |  |  |  | $ 0 | $ 0 |  |
Vesting period |  |  |  |  |  |  | 4 years |  |  |
Stock-based compensation expense incremental fair of the modified awards | $ |  |  |  |  |  | $ 143,000 |  |  |  |
Stock-based compensation expense | $ |  |  |  |  |  |  | $ 10,652,000 | 6,901,000 |  |
Stock-based compensation expense | $ |  |  | $ 4,501,000 |  |  |  | 10,652,000 | 6,901,000 |  |
Cash proceeds from exercise of stock options | $ |  |  |  |  |  |  | 7,000 | $ 1,497,000 |  |
Incremental value as a result of the modification of the awards | $ |  |  |  |  |  |  | 0 |  |  |
Incremental compensation expense recognized as a result of the modification | $ |  |  |  |  |  |  | 0 |  |  |
Total unrecognized stock-based compensation expense | $ |  |  |  |  |  | $ 10,074,000 | $ 10,074,000 |  |  |
Remaining vesting period |  |  |  |  |  |  | 2 years 10 months 2 days |  |  |
Number of vesting installments | Installment |  |  |  | 4 |  |  |  |  |  |
Vested Options Post-Termination |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Options exercisable |  |  |  |  |  | 346,028 | 346,028 |  |  |
Chief Executive Officer |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option award to purchase shares |  |  |  |  |  |  | 474,875 | 949,750 |  |
Vesting period |  |  |  |  |  |  | 5 years |  |  |
Number of separate option awards | Option |  |  |  |  | 2 |  |  | 2 |  |
Executive Chairman |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option award to purchase shares |  |  |  |  |  |  | 474,874 |  |  |
Number of separate option awards | Option |  |  |  |  |  | 2 | 2 |  |  |
Stock Option Grants |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Vesting of unvested awards |  |  |  |  |  | 90,003 |  |  |  |
Stock-based compensation expense | $ |  |  |  |  |  |  | $ 904,000 | $ 1,772,000 |  |
Expected annual equity volatility |  |  |  |  |  |  |  | 70.00% |  |
Total unrecognized stock-based compensation expense | $ |  |  |  |  |  | $ 7,357,000 | $ 7,357,000 |  |  |
Remaining vesting period |  |  |  |  |  |  | 2 years 10 months 20 days |  |  |
Stock Option Grants | Chief Executive Officer |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Unvested, Number of Shares |  |  |  |  |  |  |  |  | 3,124,252 |
Restricted Stock Units |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Vesting of unvested awards |  |  |  |  |  | 33,281 |  |  |  |
Vesting period |  |  |  |  | 3 years |  | 4 years |  |  |
Stock-based compensation expense | $ |  |  |  |  |  |  | $ 4,243,000 | $ 9,000 |  |
Restricted stock units ("RSU") granted |  |  |  |  | 117,516 |  | 2,493,335 | 117,516 |  |
Grant date fair value per share | $ / shares |  |  |  |  |  |  | $ 3.34 | $ 9.19 |  |
Total grant date fair value | $ |  |  |  |  | $ 1,080,000 |  | $ 8,316,000 |  |  |
Aggregate fair market value | $ |  |  |  |  |  |  | $ 491,000 |  |  |
Total grant date fair value recognized period |  |  |  |  | 3 years |  | 4 years |  |  |
Restricted Stock Units | Chief Executive Officer |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 4 years |  |  |
Restricted stock units ("RSU") granted |  |  |  | 649,350 |  |  | 150,000 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Unvested, Number of Shares |  |  |  |  |  |  |  |  | 150,000 |
Incentive Unit Grants |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 4 years |  |  |
Repurchase right valid period |  |  |  |  |  |  | 18 months |  |  |
Incentive Unit Awards and Replacement Preferred Stock Awards |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Expected annual equity volatility |  |  |  |  |  |  |  | 55.00% |  |
Earn-Out Shares |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense | $ |  |  |  |  |  |  | $ 2,926,000 | $ 288,000 |  |
Expected annual equity volatility |  |  |  |  |  |  |  | 54.50% |  |
Number of shares entitle to certain employees |  |  |  |  |  |  | 0 | 933,933 |  |
Expected term |  |  |  |  |  |  | 3 years | 3 years |  |
Stock Options One | Chief Executive Officer |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option award to purchase shares |  |  |  |  |  |  | 300,000 |  |  |
Vesting period |  |  |  |  |  |  | 4 years |  |  |
Stock Option Repricing Service Condition |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense | $ |  |  |  |  |  |  | $ 1,460,000 |  |  |
Stock Option Repricing Vested Shares |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense | $ |  |  |  |  |  |  | $ 456,000 |  |  |
Maximum | Stock Option Grants |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Expected annual equity volatility |  |  |  |  |  |  | 56.00% |  |  |
Expected term | [1] |  |  |  |  |  | 7 years 6 months | 6 years 2 months 1 day |  |
Minimum | Stock Option Grants |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Expected annual equity volatility |  |  |  |  |  |  | 49.00% |  |  |
Expected term | [1] |  |  |  |  |  | 6 months 3 days | 5 years 4 months 24 days |  |
Class A Common Stock | Chief Executive Officer |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option award to purchase shares |  |  |  |  |  | 3,175,000 |  | 1,899,500 |  |
Vesting period |  |  |  |  |  | 4 years |  | 4 years |  |
Class A Common Stock | Executive Chairman |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option award to purchase shares |  |  |  |  |  |  | 712,312 |  |  |
Vesting period |  |  |  |  |  |  | 4 years |  |  |
Class A Common Stock | Restricted Stock Units |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Grant date fair value per share | $ / shares |  |  |  |  | $ 9.19 |  |  |  |  |
Class A Common Stock | Stock Options One | Executive Chairman |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option award to purchase shares |  |  |  |  |  |  | 237,437 |  |  |
Class A Common Stock | Two Separate Option Awards | Chief Executive Officer |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option award to purchase shares |  |  |  |  |  |  |  | 474,875 |  |
Class A Common Stock | Stock Option Repricing |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Outstanding options |  |  |  |  |  | 5,378,308 | 5,378,308 |  |  |
Grant date fair value per share | $ / shares |  | $ 0.91 |  |  |  |  |  |  |  |
Class A Common Stock | Stock Option Repricing Service Condition |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Outstanding options |  |  |  |  |  | 4,903,434 | 4,903,434 |  |  |
Class A Common Stock | Stock Option Repricing Market and Performance Based Condition |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Outstanding options |  |  |  |  |  | 474,874 | 474,874 |  |  |
Stock-based compensation expense | $ |  |  |  |  |  |  | $ 1,000 |  |  |
Class A Common Stock | Maximum | Restricted Stock Units |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Grant date fair value per share | $ / shares |  |  |  |  |  |  | $ 3.85 |  |  |
Class A Common Stock | Maximum | Stock Option Repricing |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Grant date fair value per share | $ / shares |  | 5.24 |  |  |  |  |  |  |  |
Class A Common Stock | Minimum | Restricted Stock Units |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Grant date fair value per share | $ / shares |  |  |  |  |  |  | $ 0.78 |  |  |
Class A Common Stock | Minimum | Stock Option Repricing |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Grant date fair value per share | $ / shares |  | $ 1.28 |  |  |  |  |  |  |  |
Employee |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense | $ |  |  |  |  |  |  | $ 3,483,000 | $ 6,604,000 |  |
Employee | Stock Option Grants |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Expected term |  |  |  |  |  |  | 6 months 3 days |  |  |
Hyperfine Plan |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, capital shares reserved for future issuance |  |  |  |  |  | 16,013,762 | 16,013,762 |  |  |
Increased number of shares available for grant |  |  |  |  |  |  | 2,813,293 |  |  |
Common stock shares outstanding percentage |  |  |  |  |  | 4.00% | 4.00% |  |  |
Common stock remain available for issuance |  |  |  |  |  | 6,522,133 | 6,522,133 |  |  |
Options exercisable |  |  |  |  |  | 3,442,085 | 3,442,085 |  |  |
Outstanding options |  |  |  |  | 7,522,136 | 10,719,564 | 10,719,564 | 7,522,136 |  | 1,903,479
Option award to purchase shares |  |  |  |  |  |  | 8,685,663 | 6,771,237 |  |
Total intrinsic value of stock options exercised | $ |  |  |  |  |  |  | $ 47,000 | $ 2,752,000 |  |
Weighted-average grant date fair value of options granted | $ / shares |  |  |  |  |  |  | $ 0.62 | $ 0.66 |  |
Expected annual equity volatility |  |  |  |  |  |  |  | 70.00% |  |
Hyperfine Plan | Service and Performance Shares |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option award to purchase shares |  |  |  |  |  |  |  | 258,833 |  |
Hyperfine Plan | Employee |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Option award to purchase shares |  |  |  |  |  |  | 7,901,501 | 3,534,844 |  |
Hyperfine Plan | Restricted Stock Units | Chief Executive Officer |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Restricted stock units ("RSU") granted |  |  |  | 649,350 |  |  |  |  |  |
4Bionics Plan |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense | $ |  |  |  |  |  |  |  | $ 578,000 |  |
[1] | Expected term of 0.51 years related to certain employee award granted and forfeited within approximately six months.

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition An excess of the fair value of the modified award over the fair value of the award immediately before the modification. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The excess of the fair value of the modified award over the fair value of the award immediately before the modification. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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