Stock-Based Compensation - Options Activity, Unrecognized Costs, Valuation (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Additional disclosures
Proceeds from the exercise of stock options		$ 47,906
2014 Plan | Stock options
Options
Balance (in shares)	5,224,913
Granted (in shares)	1,136,728
Forfeited (in shares)	(85,625)
Balance (in shares)	6,276,016
Options exercisable (in shares)	4,303,603
Options vested and expected to vest (in shares)	6,276,016
Weighted average exercise price per share
Balance (in dollars per shares)	$ 8.74
Granted (in dollars per shares)	2.17
Forfeited (in dollars per share)	10.97
Balance (in dollars per shares)	7.52
Options exercisable (in dollars per shares)	9.58
Options vested and expected to vest (in dollars per share)	$ 7.52
Additional disclosures
Options Outstanding Weighted Average Contractual term	6 years 2 months 1 day
Options Vested and Expected to Vest Weighted Average Contractual Life	5 years
Expected stock based compensation expense	$ 3,900,000
Recognition period for compensation costs	2 years 4 months 24 days
Proceeds from the exercise of stock options		$ 47,906
Weighted Average Grant Date Fair Value
Granted (in dollars per share)	$ 1.74	$ 2.84
Assumptions and Methodology
Weighted average risk-free interest rate (as a percent)	2.02%	0.37%
Expected term of options (in years)	6 years 1 month 9 days	6 years 2 months 15 days
Expected stock price volatility (as a percent)	100.23%	95.60%
Expected dividend yield (as a percent)	0.00%	0.00%