Redeemable Convertible Preferred Stock, Common Stock and Preferred Stock - Conversion Right and Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Mar. 29, 2021	Aug. 12, 2020	Jan. 22, 2020	Dec. 14, 2018	May 16, 2017	Mar. 03, 2017	Oct. 27, 2016
Redeemable Convertible Preferred Stock, Common Stock and Preferred Stock
Dividend rate (as a percent)	8.00%
Dividends preferred stock	$ 0	$ 0
Minimum
Redeemable Convertible Preferred Stock, Common Stock and Preferred Stock
Threshold net proceeds from qualified public offering.	$ 75,000
Series Seed redeemable convertible preferred stock
Redeemable Convertible Preferred Stock, Common Stock and Preferred Stock
Purchase price (in dollars Per share}	$ 0.8675						$ 0.8675	$ 0.8675	$ 0.8675
Preferred stock, convertible, conversion price (in dollars per share)	0.8675
Series A Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock, Common Stock and Preferred Stock
Purchase price (in dollars Per share}	1.041			$ 1.041	$ 1.041	$ 1.041
Preferred stock, convertible, conversion price (in dollars per share)	1.041
Series B Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock, Common Stock and Preferred Stock
Purchase price (in dollars Per share}	2.172		$ 2.172
Preferred stock, convertible, conversion price (in dollars per share)	$ 2.172