Convertible Preferred Shares - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended		12 Months Ended
	Apr. 17, 2020	Aug. 28, 2019	Sep. 30, 2018	Aug. 31, 2017	Dec. 31, 2020
Convertible preferred shares
Debt Instrument, Redemption [Line Items]
Convertible preferred shares issued (in shares)				2,650,980	2,650,980
Proceeds from Issuance of Convertible Preferred Stock				$ 3.9
Preferred shares issuance costs				$ 0.1
Convertible A preferred stock
Debt Instrument, Redemption [Line Items]
Convertible preferred shares issued (in shares)			7,131,525		7,131,525
Proceeds from Issuance of Convertible Preferred Stock			$ 35.4
Preferred shares issuance costs			$ 0.3
Convertible B preferred stock
Debt Instrument, Redemption [Line Items]
Convertible preferred shares issued (in shares)					6,636,667
Proceeds from Issuance of Convertible Preferred Stock	$ 61.6
Preferred shares issuance costs	0.3
Proceeds from issuance of debt	$ 80.0
Convertible preferred shares (in shares)	4,913,404
Conversion of notes into B convertible preferred shares (in shares)	1,723,263	710,621			1,723,263
Issuance price of Series B convertible preferred shares (in dollars per share)	$ 1.42
Ordinary Shares
Debt Instrument, Redemption [Line Items]
Convertible preferred shares issued (in shares)					16,419,172
Ordinary Shares | Common Stock
Debt Instrument, Redemption [Line Items]
Convertible preferred shares issued (in shares)					16,419,172