Preferred Stock, Common Stock and Stockholders' Equity - Summary of Recognized Stock-Based Compensation Expense (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,878,954	$ 1,628,558
Research and development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	101,754	316,892
Selling, general and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,777,200	$ 1,311,666