NET LOSS PER SHARE - Schedule of Anti-dilutive Common Equivalent Shares (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common equivalent shares	20,032,859	53,681,288	20,032,859	53,681,288
Outstanding Options to Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common equivalent shares	8,544,480	7,597,120	8,544,480	7,597,120
Outstanding Legacy Hyperfine Convertible Preferred Stock (Series A through D)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common equivalent shares		46,084,168		46,084,168
Outstanding RSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common equivalent shares	2,037,517		2,037,517
Earn-Out Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common equivalent shares	9,450,862		9,450,862