Convertible Preferred Stock - Narrative (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 25, 2021	Dec. 31, 2020
Temporary Equity [Line Items]
Shares Authorized	135,936,731	135,936,731
Proceeds from Issuance of Redeemable Convertible Preferred Stock	$ 99,414,000	$ 99,414,000
Series A
Temporary Equity [Line Items]
Shares Authorized	17,000,000	17,000,000
Proceeds from Issuance of Redeemable Convertible Preferred Stock	$ 16,982,000	$ 16,982,000
Series B
Temporary Equity [Line Items]
Shares Authorized	25,186,738	25,186,738
Proceeds from Issuance of Redeemable Convertible Preferred Stock	$ 24,943,000	$ 24,943,000
Series B-1
Temporary Equity [Line Items]
Shares Authorized	93,749,993	93,749,993
Proceeds from Issuance of Redeemable Convertible Preferred Stock	$ 57,489,000	$ 57,489,000