CONDENSED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (Unaudited) - USD ($) $ in Thousands	Total		Redeemable Convertible Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning balance at Dec. 31, 2019	$ (25,665)			$ 2	$ 699	$ (26,366)
Beginning balance, shares at Dec. 31, 2019			6,712,085
Beginning balance at Dec. 31, 2019			$ 30,960
Beginning balance, Shares at Dec. 31, 2019				2,257,740
Issuance of common stock upon exercise of stock options, shares	0
Issuance of Series B redeemable convertible preferred stock, net of issuance cost			$ 17,466
Issuance of Series B redeemable convertible preferred stock, net of issuance cost, shares			3,754,084
Stock-based compensation	$ 58				58
Net loss	(1,727)					(1,727)
Ending balance at Mar. 31, 2020	(27,334)			$ 2	757	(28,093)
Ending balance, Shares at Mar. 31, 2020			10,466,169
Ending balance at Mar. 31, 2020			$ 48,426
Ending balance, Shares at Mar. 31, 2020				2,257,740
Beginning balance at Dec. 31, 2020	$ (62,308)	[1]		$ 3	1,403	(63,714)
Beginning balance, shares at Dec. 31, 2020	23,978,747	[1]	23,978,747
Beginning balance at Dec. 31, 2020	$ 121,080	[1]	$ 121,080
Beginning balance, Shares at Dec. 31, 2020				2,712,694
Conversion of redeemable convertible preferred shares into common stock	121,080			$ 24	121,056
Conversion of redeemable convertible preferred shares into common stock, shares			(23,978,747)
Conversion of redeemable convertible preferred shares into common stock			$ (121,080)
Conversion of redeemable convertible preferred shares into common stock, shares				23,978,747
Conversion of convertible notes into common stock	24,982			$ 2	24,980
Conversion of convertible notes into common stock, shares				1,470,947
Issuance of common stock upon IPO, net of issuance costs	159,899			$ 10	159,889
Issuance of common stock upon IPO, net of issuance costs, shares				10,350,000
Issuance of common stock upon exercise of stock options	$ 48				48
Issuance of common stock upon exercise of stock options, shares	37,760			37,760
Stock-based compensation	$ 527				527
Stock-based compensation, shares				0
Net loss	(13,316)					(13,316)
Ending balance at Mar. 31, 2021	$ 230,912			$ 39	$ 307,903	$ (77,030)
Ending balance, Shares at Mar. 31, 2021	0
Ending balance, Shares at Mar. 31, 2021				38,550,148

[1] The balance sheet as of December 31, 2020 is derived from the audited financial statements as of that date