Common stock - Warrants (Details) - Warrants	Mar. 31, 2022 $ / shares shares
Exercise Price $9.00
Class of Warrant or Right [Line Items]
Warrants outstanding | shares	803,112
Exercise price | $ / shares	$ 9.00
Exercise Price $45.00
Class of Warrant or Right [Line Items]
Warrants outstanding | shares	500,000
Exercise price | $ / shares	$ 45.00