Business Combination - Summary of common stock outstanding following the consummation of business combination (Detail) - shares		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Common stock, shares outstanding		41,690,383	40,389,975
Common stock, shares outstanding		40,369,373
Percentage of ownership		100.00%
Old eFFECTOR Stockholders
Business Acquisition [Line Items]
Common stock, shares outstanding		30,021,762
Percentage of ownership		74.40%
LWAC Stockholders
Business Acquisition [Line Items]
Common stock, shares outstanding		521,358
Percentage of ownership		1.30%
LWAC Founders
Business Acquisition [Line Items]
Common stock, shares outstanding	[1]	3,756,250
Percentage of ownership	[1]	9.30%
PIPE Investors
Business Acquisition [Line Items]
Common stock, shares outstanding		6,070,003
Percentage of ownership		15.00%

[1] Excludes 300,000 Sponsor Shares subject to vesting that are not considered outstanding from an accounting perspective.