Convertible Preferred Shares - Schedule of preferred shares and Series A convertible preferred shares (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument, Redemption [Line Items]
Convertible preferred shares authorized (in shares)		9,782,505
Convertible preferred shares outstanding (in shares)		9,782,505
Liquidation Preference		$ 39,279
Carrying Value		$ 38,908
Convertible preferred shares
Debt Instrument, Redemption [Line Items]
Convertible preferred shares authorized (in shares)		2,650,980
Convertible preferred shares outstanding (in shares)	0	2,650,980
Liquidation Preference		$ 3,865
Carrying Value		$ 3,761
Convertible A preferred stock
Debt Instrument, Redemption [Line Items]
Convertible preferred shares authorized (in shares)		7,131,525
Convertible preferred shares outstanding (in shares)	0	7,131,525
Liquidation Preference		$ 35,414
Carrying Value		$ 35,147