Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)			3 Months Ended		9 Months Ended
	Jul. 22, 2021	Jun. 25, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Revenues			$ 0	$ 0	$ 0	$ 0
Investments			11,577,850		11,577,850		$ 1,599,750
Short-term investment			24,989,700		24,989,700
Accounts receivable, net			70,000		70,000		2,500,000
Proceeds from initial public offering					56,000,000
Common stock issued to holder of redeemable preferred stock	23,768,416
Cumulative Dividends	$ 2,800,000
Stockholders' Equity, Reverse Stock Split		a 3-for-7 reverse stock split for all issued and outstanding common stock
Cash and cash equivalents			15,125,073	$ 6,482,812	15,125,073	$ 6,482,812	$ 8,455,834	$ 7,355,834
Research and development					24,700,000
U.S. Government Backed Securities [Member]
Investments			10,000,000.0		10,000,000.0
Short-term investment			$ 25,000,000.0		25,000,000.0
IPO [Member] | U.S. Treasury bills [Member]
Proceeds from initial public offering					3,000,000.0
IPO [Member] | Short-term Investments [Member]
Proceeds from initial public offering					25,000,000.0
IPO [Member] | US Treasury Notes [Member]
Proceeds from initial public offering					10,000,000.0
Common Stock [Member]
Stock Issued During Period Shares			7,000,000
Common Stock [Member] | IPO [Member]
Stock Issued During Period Shares	7,000,000
Share Price	$ 8.00
Proceeds from initial public offering	$ 49,200,000
Wugen License [Member]
Investments			$ 1,600,000		1,600,000
Accounts Payable and Accrued Liabilities [Member]
Deferred Revenue, Current			$ 1,100,000		$ 1,100,000