Stock-Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employees purchased, value	$ 78,732	$ 56,739
Stock-based compensation expense			$ 1,865,520	$ 985,260
2019 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employees purchased, shares	53,852
Employees purchased, value	$ 100,000
Stock-based compensation expense	87,092		$ 122,177
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting Period			4 years
Stock option expiration Period			10 years
Unrecognized compensation cost, stock options	$ 3,100,000		$ 3,100,000
Unrecognized stock-based compensation expense, period for recognition			2 years 6 months 18 days
Number of Stock Options, Granted			698,000
Stock options granted, weighted-average exercise price			$ 4.64
Weighted-average grant date fair value of stock options granted			$ 3.69
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expense, period for recognition			2 years 2 months 1 day
Unvested restricted stock, shares	174,908		174,908
Unrecognized compensation expense	$ 600,000		$ 600,000
Common stock issued as result of vesting of restricted stock			60,758
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting Period	4 years
Unrecognized stock-based compensation expense, period for recognition			3 years 11 months 26 days
Unvested restricted stock, shares	15,000		15,000
Unrecognized compensation expense	$ 200,000		$ 200,000
Shares granted	15,000