0001620463 2025-12-18 2025-12-18 0001620463 false 8-K 2025-12-18 Athira Pharma, Inc. DE 001-39503 45-3368487 18706 North Creek Parkway Suite 104 Bothell WA 98011 425 620-8501 false false false false Common Stock, $0.0001 par value per share ATHA NASDAQ true false