CONVERTIBLE PREFERRED STOCK AND COMMON STOCK - Conversion (Details) - USD ($) $ / shares in Units, $ in Millions					12 Months Ended
	Apr. 01, 2021	Mar. 30, 2021	Dec. 03, 2020	Aug. 27, 2019	Dec. 31, 2021
Class of Stock [Line Items]
Number of common stock issued upon conversion					1
IPO
Class of Stock [Line Items]
Shares issued		12,650,000
Series A and Series B-1 convertible preferred stock
Class of Stock [Line Items]
Number of shares converted					5.282
Series B-1 preferred stock
Class of Stock [Line Items]
Offering price per share				$ 3.178
Shares issued				7,888,392
Series B-1 preferred stock | Maximum
Class of Stock [Line Items]
Proceeds from issuance of convertible preferred stock				$ 25.1
Series B-2 preferred stock
Class of Stock [Line Items]
Offering price per share					$ 3.841
Proceeds from issuance of convertible preferred stock					$ 25.1
Number of shares available for issuance					6,527,654
Number of days for issuance of shares					120 days
Term to receive communication from FDA					35 days
Series C preferred stock
Class of Stock [Line Items]
Offering price per share			$ 7.333
Proceeds from issuance of convertible preferred stock			$ 95.0
Shares issued			12,954,423
Convertible preferred stock | IPO
Class of Stock [Line Items]
Number of common stock issued upon conversion	35,557,569
Convertible preferred stock | Minimum
Class of Stock [Line Items]
Proceeds from issuance of convertible preferred stock					$ 70.0
Convertible preferred stock | Maximum
Class of Stock [Line Items]
Offering price per share					$ 8.80