Commitments and Contingencies - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Commitments And Contingencies [Line Items]
Legal settlement expense		$ 10,000,000		$ 10,000,000
Insurance recovery in operating expenses	$ 1,600,000		$ 1,628,000
Insurance recovery receivable	1,628,000		1,628,000
Accrued legal settlement	$ 10,000,000	$ 10,000,000	10,000,000	10,000,000
Operating lease expense			353,000	368,000
Variable lease expense			$ 186,000	$ 167,000
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		5 years
Laboratory and Office Facilities | Bothell, Washington | Minimum
Commitments And Contingencies [Line Items]
Operating lease initial term	6 years 3 months 18 days		6 years 3 months 18 days
Laboratory and Office Facilities | Bothell, Washington | Maximum
Commitments And Contingencies [Line Items]
Operating lease initial term	7 years		7 years