Net Loss Per Share - Antidilutive securities (Details) - shares	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Antidilutive securities
Antidilutive securities excluded from computation (in shares)	33,090,240	4,398,474
Outstanding stock options
Antidilutive securities
Antidilutive securities excluded from computation (in shares)	4,419,549	4,181,702
Unvested restricted stock
Antidilutive securities
Antidilutive securities excluded from computation (in shares)	0	15,776
Unvested RSUs
Antidilutive securities
Antidilutive securities excluded from computation (in shares)	196,522	200,996
K2 warrant
Antidilutive securities
Antidilutive securities excluded from computation (in shares)	339,725	0
Common Warrant
Antidilutive securities
Antidilutive securities excluded from computation (in shares)	22,250,000	0
Pre-funded Warrant
Antidilutive securities
Antidilutive securities excluded from computation (in shares)	4,440,000	0
Convertible debt (as-converted to common stock)
Antidilutive securities
Antidilutive securities excluded from computation (in shares)	1,444,444	0