Summary of Significant Accounting Policies - Additional Information (Detail)		12 Months Ended
	Aug. 26, 2021 $ / shares shares	Dec. 31, 2021 USD ($) Segment $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares
Summary Of Significant Accounting Policies [Line Items]
Capital stock held | shares	8,100,000
Common stock, shares outstanding | shares	2,500,000	20,894,695	2,542,358
Common stock, shares authorized | shares	300,000,000.0	300,000,000	20,000,000
Common stock, par value | $ / shares	$ 0.0001	$ 0.0001	$ 0.0001
Reverse stock split, description		No fractional shares were issued in connection with the Reverse Stock Split.
Number of operating segment | Segment		1
Cash and cash equivalents		$ 148,989,000	$ 4,455,000
Convertible promissory notes outstanding		0
Contract intangible asset value		3,900,000
Fair value, assets, transfers from Level 1 to Level 2		0	0
Fair value, assets, transfers from Level 2 to Level 1		0	0
Fair value, liabilities, transfers from Level 1 to Level 2		0	0
Fair value, liabilities, transfers from Level 2 to Level 1		0	0
Fair value, assets, transfers into Level 3		0	0
Fair value, assets, transfers out of Level 3		0	0
Fair value, liabilities, transfers into Level 3		0	0
Fair value, liabilities, transfers out of Level 3		0	0
Accounts receivable			14,149,000
Allowance for doubtful accounts		$ 0	0
Property and equipment estimated useful lives		5 years
Estimated useful life of intangible assets		14 years 3 months 18 days
Convertible promissory notes converted into common stock | shares	698,018	698,018
Grant [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable			100,000
EOC Pharma (Hong Kong) Limited [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable			$ 14,000,000.0
Discount Rate [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated discount rate			25
Money Market Investments [Member]
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents		$ 140,000,000.0	$ 3,000,000.0