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Liquidity and Going Concern (Narrative) (Details) - USD ($)				6 Months Ended
	May 12, 2026	Dec. 01, 2025	Aug. 11, 2025	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 12, 2025	Mar. 04, 2024	Jul. 10, 2023	Jan. 10, 2023
Liquidity and Going Concern
Accumulated deficit				$ (542,739,000)	$ (501,534,000)
Cash and cash equivalents				23,952,000	$ 8,688,000	$ 4,328,000
Proceeds from issuance of common stock under ATM, net				2,373,000
December 2025 Sales Agreement
Liquidity and Going Concern
Maximum aggregate offer price		$ 100,000,000
Proceeds from issuance of common stock under ATM, net				$ 2,400,000
Issuance of common stock under ATM, net (in shares)				338,000
Innoviva Strategic Opportunities LLC
Liquidity and Going Concern
Aggregate amount										$ 30,000,000
Interest rate (as a percent)										8.00%
Innoviva Strategic Opportunities LLC \| Secured term loan
Liquidity and Going Concern
Interest rate (as a percent)				8.00%
2023 Credit Agreement \| Innoviva Strategic Opportunities LLC \| Secured term loan
Liquidity and Going Concern
Aggregate amount									$ 25,000,000
Interest rate (as a percent)									14.00%
2024 Credit Agreement \| Innoviva Strategic Opportunities LLC \| Secured term loan
Liquidity and Going Concern
Aggregate amount								$ 35,000,000
Interest rate (as a percent)								14.00%
March 2025 Credit Agreement \| Innoviva Strategic Opportunities LLC \| Secured term loan
Liquidity and Going Concern
Aggregate amount							$ 10,000,000
Interest rate (as a percent)							14.00%
August 2025 Loan \| Innoviva Strategic Opportunities LLC
Liquidity and Going Concern
Aggregate amount			$ 15,000,000
Interest rate (as a percent)			14.00%
Loan maturity date			Jan. 11, 2029
August 2025 Loan \| Innoviva Strategic Opportunities LLC \| Secured term loan
Liquidity and Going Concern
Aggregate amount			$ 15,000,000
Interest rate (as a percent)			14.00%
May 2026 Loan [Member] \| Innoviva Strategic Opportunities LLC
Liquidity and Going Concern
Aggregate amount	$ 25,000,000
Interest rate (as a percent)	14.00%
Loan maturity date	Jan. 11, 2029