Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended						3 Months Ended					9 Months Ended
	Aug. 31, 2021	Jun. 30, 2021	May 31, 2021	Jan. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Mar. 11, 2020
Class of Stock [Line Items]
Stock Issued During Period, Value, Employee Stock Purchase Plan		$ 18,950		$ 4,197	$ 7,606			$ 18,950	$ 4,197	$ 7,606
Net proceeds from issuance of stock and warrants												$ 19,673,605	$ 4,151,037
Common stock, par value (in dollars per share)				$ 0.0001			$ 0.0001					$ 0.0001		$ 0.0001
Compensation cost not yet recognized							$ 170,151					$ 170,151
Compensation cost not yet recognized, period for recognition												1 year 3 months 18 days
Stock Issued During Period, Value, Stock Options Exercised	$ 78,500						$ 78,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	50,000
Stock Issued During Period, Value, Restricted Stock Award, Gross			$ 125,000
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans		7,055		2,408	4,364
Stock Issued During Period, Shares, Restricted Stock Award, Gross			42,808
Stock Issued During Period, Shares, Restricted Stock Award, Gross			42,808
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans							7,055		2,408	4,364
Stock Issued During Period, Value, Employee Stock Purchase Plan								$ 1	$ 1	$ 1
Stock Issued During Period, Shares, New Issues							1,549,024	1,207,681		2,092,541	256,078
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited												7,318
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures												10,702
Stock Issued During Period, Value, Stock Options Exercised							$ 5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period							50,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross							10,877	13,911
Stock Issued During Period, Shares, Restricted Stock Award, Gross							10,877	13,911
Stock Issued During Period, Value, Restricted Stock Award, Gross							$ 1	$ 3
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited												7,318
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures												10,702
Separation Agreement [Member] | Common Stock [Member]
Class of Stock [Line Items]
Stock Price (in dollars per share)															$ 1.41
Common Stock, Value, Issued						$ 43,751
Stock Issued During Period, Shares, Other						31,000
Restricted Stock | Common Stock [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares												24,788
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares												24,788
At The Market Offering Program [Member]
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock												$ 19,571,958	$ 4,143,431
At The Market Offering Program [Member] | Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues												2,756,705	2,348,619