Stockholders' equity - Schedule of RSU Activity (Details) - Restricted stock units	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Number of Shares
Non-vested beginning balance (in shares) | shares	132,000
Restricted stock units granted (in shares) | shares	700,000
Restricted stock units vested (in shares) | shares	(24,750)
Restricted stock units forfeited (in shares) | shares	(428,750)
Non-vested ending balance (in shares) | shares	378,500
Weighted Average Grant Date Fair Value
Non-vested beginning balance (in dollars per share) | $ / shares	$ 9.97
Restricted stock units granted (in dollars per share) | $ / shares	3.69
Restricted stock units vested (in dollars per share) | $ / shares	12.20
Restricted stock units forfeited (in dollars per share) | $ / shares	4.66
Non-vested ending balance (in dollars per share) | $ / shares	$ 4.22