NET LOSS PER SHARE - Schedule of Anti-dilutive Common Equivalent Shares (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common equivalent shares	24,148,716	54,511,052	24,148,716	54,511,052
Outstanding Options to Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common equivalent shares	11,782,166	8,426,884	11,782,166	8,426,884
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	2,386,647		2,386,647
Earn-Out Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total anti-dilutive common equivalent shares	9,979,903		9,979,903