Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Deficit (Unaudited) - USD ($)	Total	Initial Public Offering	Convertible Preferred Stock	Convertible Preferred Stock Initial Public Offering	Common Stock	Common Stock Initial Public Offering	Additional Paid-In Capital	Additional Paid-In Capital Initial Public Offering	Accumulated Deficit
Balances at Dec. 31, 2019	$ (17,138,000)						$ 268,000		$ (17,406,000)
Balances, shares at Dec. 31, 2019			7,063,104
Balances at Dec. 31, 2019			$ 59,681,000
Balances, shares at Dec. 31, 2019					642,903
Exercise of stock options	248,000				$ 1,000		247,000
Exercise of stock options, shares					125,298
Vesting of restricted common stock, shares					264,226
Stock-based compensation expense	365,000						365,000
Net loss	(18,320,000)								(18,320,000)
Balances at Sep. 30, 2020	(34,845,000)				$ 1,000		880,000		(35,726,000)
Balances, shares at Sep. 30, 2020			7,063,104
Balances at Sep. 30, 2020			$ 59,681,000
Balances, shares at Sep. 30, 2020					1,032,427
Balances at Jun. 30, 2020	(27,804,000)				$ 1,000		751,000		(28,556,000)
Balances, shares at Jun. 30, 2020			7,063,104
Balances at Jun. 30, 2020			$ 59,681,000
Balances, shares at Jun. 30, 2020					944,305
Exercise of stock options	1,000						1,000
Exercise of stock options, shares					470,000
Vesting of restricted common stock, shares					87,652
Stock-based compensation expense	128,000						128,000
Net loss	(7,170,000)								(7,170,000)
Balances at Sep. 30, 2020	(34,845,000)				$ 1,000		880,000		(35,726,000)
Balances, shares at Sep. 30, 2020			7,063,104
Balances at Sep. 30, 2020			$ 59,681,000
Balances, shares at Sep. 30, 2020					1,032,427
Balances at Dec. 31, 2020	(42,462,000)				$ 1,000		1,070,000		(43,533,000)
Balances, shares at Dec. 31, 2020			7,063,104
Balances at Dec. 31, 2020	59,681,000		$ 59,681,000
Balances, shares at Dec. 31, 2020					1,135,858
Issuance of Series C convertible preferred stock (net of issuance costs of $270)			$ 99,730,000
Issuance of Series C convertible preferred stock (net of issuance costs of $270), shares			8,553,168
Issuance of common stock, net of issuance costs	89,647,000				$ 1,000		89,646,000
Issuance of common stock, net of issuance costs, shares					6,666,667
Conversion of convertible preferred stock to common stock upon closing of initial public offering				$ 159,411,000
Conversion of convertible preferred stock to common stock upon closing of initial public offering, shares				15,616,272
Conversion of convertible preferred stock to common stock upon closing of initial public offering		$ 159,411,000				$ 1,000		$ 159,410,000
Conversion of convertible preferred stock to common stock upon closing of initial public offering, shares						15,616,272
Exercise of stock options	171,000						171,000
Exercise of stock options, shares					108,657
Vesting of restricted common stock, shares					233,767
Stock-based compensation expense	1,732,000						1,732,000
Net loss	(34,425,000)								(34,425,000)
Balances at Sep. 30, 2021	174,074,000				$ 3,000		252,029,000		(77,958,000)
Balances, shares at Sep. 30, 2021					23,761,221
Balances at Jun. 30, 2021	(60,030,000)				$ 1,000		2,088,000		(62,119,000)
Balances, shares at Jun. 30, 2021			15,616,272
Balances at Jun. 30, 2021			$ 159,411,000
Balances, shares at Jun. 30, 2021					1,419,819
Issuance of common stock, net of issuance costs	89,647,000				$ 1,000		89,646,000
Issuance of common stock, net of issuance costs, shares					6,666,667
Conversion of convertible preferred stock to common stock upon closing of initial public offering				$ 159,411,000
Conversion of convertible preferred stock to common stock upon closing of initial public offering, shares				15,616,272
Conversion of convertible preferred stock to common stock upon closing of initial public offering		$ 159,411,000				$ 1,000		$ 159,410,000
Conversion of convertible preferred stock to common stock upon closing of initial public offering, shares						15,616,272
Vesting of restricted common stock, shares					58,463
Stock-based compensation expense	885,000						885,000
Net loss	(15,839,000)								(15,839,000)
Balances at Sep. 30, 2021	$ 174,074,000				$ 3,000		$ 252,029,000		$ (77,958,000)
Balances, shares at Sep. 30, 2021					23,761,221