Stock-Based Compensation - Additional Information (Detail) - USD ($)		3 Months Ended	9 Months Ended
	Mar. 29, 2019	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation			$ 985,260	$ 704,425
2019 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance	403,500
Percent of payroll deductions	10.00%
Percentage of discount from fair market value of common stock on first or last trading day of offering period	85.00%
Stock-based compensation		$ 8,596	$ 8,596
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		$ 1,536,208	$ 1,536,208
Unrecognized stock-based compensation expense, period for recognition			3 years 4 months 28 days
Number of Stock Options, Granted			725,000
Stock options granted, weighted-average exercise price			$ 2.67
Weighted-average grant date fair value of stock options granted			$ 2.02
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expense, period for recognition			3 years 2 months 1 day
Unvested restricted stock, shares		323,191	323,191
Unrecognized compensation expense		$ 917,158	$ 917,158
Common stock issued as result of vesting of restricted stock			214