Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2022	Sep. 30, 2023
Commitments And Contingencies [Line Items]
Legal settlement expense	$ 10,000
Accrued legal settlement	$ 10,000	$ 10,000
Wang V. Athira Pharma Inc.,
Commitments And Contingencies [Line Items]
Lawsuit filing date		June 25, 2021
Name of plaintiff		Fan Wang and Hang Gao
Jawandha V. Athira Pharma Inc.,
Commitments And Contingencies [Line Items]
Lawsuit filing date		June 25, 2021
Name of plaintiff		Harshdeep Jawandha
Slyne V. Athira Pharma Inc.,
Commitments And Contingencies [Line Items]
Lawsuit filing date		June 25, 2021
Name of plaintiff		Timothy Slyne and Tai Slyne
Athira Pharma Inc V Dr. Kawas
Commitments And Contingencies [Line Items]
Lawsuit filing date		August 12, 2022
Name of defendant		Dr. Kawas
Laboratory and Office Facilities | Bothell, Washington
Commitments And Contingencies [Line Items]
Operating lease expiration month and year		2027-08
Operating lease existence of option to extend		true
Operating lease, additional term of contract		5 years
Laboratory and Office Facilities | Bothell, Washington | Minimum
Commitments And Contingencies [Line Items]
Operating lease initial term		6 years 3 months 18 days
Laboratory and Office Facilities | Bothell, Washington | Maximum
Commitments And Contingencies [Line Items]
Operating lease initial term		7 years