Equity-based compensation - Stock Options and Restricted Stock Units (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
Stock Options
Shares Underlying Options
Outstanding, beginning of period (in shares)		53,929
Granted		34,680
Forfeited		(777)
Outstanding, end of period (in shares)	87,833	87,833	53,929
Exercisable, end of period (in shares)	18,652	18,652
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share)		$ 54.50
Granted		15.00
Forfeited		143.50
Outstanding, end of period (in dollars per share)	$ 38.00	38.00	$ 54.50
Exercisable, end of period	$ 58.5	$ 58.5
Weighted Average Remaining Contractual Term (Years)
Outstanding, end of period (in years)		9 years 1 month 6 days	9 years 7 months 6 days
Exercisable, end of period (in years)		8 years 9 months 18 days
Aggregate intrinsic value	$ 300	$ 300
Restricted Stock Units
Shares Underlying Options
Granted	0	9,000
Vested		(3,750)
Outstanding, end of period (in shares)	5,250	5,250
Weighted Average Exercise Price
Granted		$ 15.50
Vested		15.50
Outstanding, end of period (in dollars per share)	$ 15.50	$ 15.50
Weighted Average Remaining Contractual Term (Years)
Outstanding, end of period (in years)		7 months 6 days
Granted (in years)		1 year
Aggregate intrinsic value	$ 81,376	$ 81,376
Aggregate intrinsic value, Granted	$ 139,500	$ 139,500