Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021 USD ($) Segment	Dec. 31, 2020 USD ($)
Significant Accounting Policies [Line Items]
Number of operating segment | Segment	1
Allowance for doubtful accounts receivable	$ 0	$ 0
Bad debt expense	0	0
Inventory raw materials	150,000	150,000
Inventory finished goods	35,000	$ 86,000
Inventory reserve for obsoletion	30,000
Gimoti [Member]
Significant Accounting Policies [Line Items]
Purchase by third party for research purposes	718,000
Accounts Payable and Accrued Expenses [Member]
Significant Accounting Policies [Line Items]
Liabilities for co-pay assistance	$ 44,000