Stockholders' Equity - Stock Option Activity (Details)	6 Months Ended
	Jun. 30, 2022 USD ($) $ / shares shares
Shares
Stock options outstanding at beginning of period | shares	2,954,315
Granted | shares	153,300
Expired | shares	(40,375)
Forfeited | shares	(59,254)
Stock options outstanding at end of period | shares	3,007,986
Stock options exercisable at end of period | shares	1,447,074
Weighted Average Exercise Price
Stock options outstanding at beginning of period (in dollars per share) | $ / shares	$ 7.62
Granted (in dollars per share) | $ / shares	2.80
Expired (in dollars per share) | $ / shares	12.72
Forfeited | $ / shares	4.71
Stock options outstanding at end of period (in dollars per share) | $ / shares	7.37
Stock options exercisable at end of period | $ / shares	$ 10.49
Aggregate Intrinsic Value
Stock options outstanding at end of period | $	$ 85,968
Stock options exercisable at end of period | $	$ 68,299
Weighted Average Remaining Contractual Life
Stock options outstanding at end of period	8 years 7 months 6 days
Stock options exercisable at end of period	8 years
Unrecognized stock-based compensation expense | $	$ 4,400,000
Unrecognized stock-based compensation expense, recognition period	1 year 4 months 24 days