Convertible Preferred Series Equity and Stockholders Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended					3 Months Ended	9 Months Ended
	Jan. 31, 2021	Jul. 31, 2020	Nov. 30, 2012	Feb. 29, 2012	Dec. 31, 2011	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Oct. 31, 2021	Oct. 19, 2021	Jun. 30, 2021	Jun. 27, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Date of Incorporation							Jul. 22, 2020
Options reserved for future grant							27,798,275
Common stock share authorized							74,687,845					74,687,845	72,187,845
Common stock par value							$ 0.01					$ 0.01	$ 0.01
Convertible preferred stock, authorized												20,421,200
Convertible preferred stock, par value												$ 0.01
Number of aggregate issued	151,515
Proceeds from issuance of common stock	$ 1,000						$ 1,001	$ 1,348
Proceeds from issuance of convertible preferred stock								$ 36,030
Price per share	$ 6.60
Treasury stock repurchase shares							85,050	41,665
Treasury stock repurchase value							$ 561	$ 231
Average cost per share							$ 6.60	$ 5.50
Common Stock
Class of Stock [Line Items]
Number of aggregate issued							151,515	243,825
Subsequent Event | Initial Public Offering | Common Stock
Class of Stock [Line Items]
Conversion of shares									20,421,200	20,421,200
Series A Convertible Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, authorized							13,812,500					13,812,500	13,812,500
Convertible preferred stock, par value							$ 0.01						$ 0.01
Number of aggregate issued			10,562,495	10,562,495	3,250,005
Proceeds from issuance of convertible preferred stock			$ 3,250	$ 3,250	$ 1,000
Price per share			$ 0.30769	$ 0.30769	$ 0.30769
Convertible preferred stock, outstanding						13,812,500	13,812,500	13,812,500			13,812,500		13,812,500	13,812,500	13,812,500
Series A Convertible Preferred Stock | Subsequent Event | Initial Public Offering | Common Stock
Class of Stock [Line Items]
Conversion of shares										13,812,500
Series B Convertible Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, authorized							6,608,700					6,608,700	6,608,700
Convertible preferred stock, par value							$ 0.01						$ 0.01
Number of aggregate issued		6,608,700
Proceeds from issuance of convertible preferred stock		$ 36,030
Issuance costs		$ 1,970				$ 1,970		$ 1,970
Price per share		$ 5.75
Convertible preferred stock, outstanding						6,608,700	6,608,700	6,608,700			6,608,700		6,608,700
Series B Convertible Preferred Stock | Subsequent Event | Initial Public Offering | Common Stock
Class of Stock [Line Items]
Conversion of shares										6,608,700