Stock-Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employees purchased, value		$ 56,739
Stock-based compensation expense			$ 545,431	$ 697,486
2019 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employees purchased, shares			38,809
Employees purchased, value			$ 56,739
Stock-based compensation expense	$ 20,372		$ 35,084
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option vesting Period			4 years
Stock option expiration Period			10 years
Unrecognized compensation cost, stock options	$ 1,900,000		$ 1,900,000
Unrecognized stock-based compensation expense, period for recognition			3 years 21 days
Number of Stock Options, Granted			520,500
Stock options granted, weighted-average exercise price			$ 2.31
Weighted-average grant date fair value of stock options granted			$ 1.83
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expense, period for recognition			2 years 5 months 1 day
Unvested restricted stock, shares	195,161		195,161
Unrecognized compensation expense	$ 700,000		$ 700,000
Common stock issued as result of vesting of restricted stock			40,505
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expense, period for recognition			3 months
Unvested restricted stock, shares	109,525		109,525
Unrecognized compensation expense	$ 900,000		$ 900,000
Shares granted	109,525