Shareholders' Equity (Narrative) (Details) $ / shares in Units, $ in Millions			9 Months Ended
	Mar. 31, 2022 USD ($) shares	Feb. 09, 2022 USD ($) tranche $ / shares shares	Sep. 30, 2022 shares
Common Stock
Class of Stock [Line Items]
Sale of common stock, net of issuance costs (in shares)			9,000,000
Innoviva Strategic Opportunities LLC [Member] | Securities Purchase Agreement [Member]
Class of Stock [Line Items]
Sale of common stock, net of issuance costs (in shares)		9,000,000
Shares Issued, Price Per Share | $ / shares		$ 5.00
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		4,500,000
Exercise price of warrants | $ / shares		$ 5.00
Number of tranches | tranche		2
Innoviva Strategic Opportunities LLC [Member] | Securities Purchase Agreement First Tranche [Member]
Class of Stock [Line Items]
Sale of common stock, net of issuance costs (in shares)		3,614,792
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		1,807,396
Proceeds from issuance of common stock and warrants | $		$ 18.1
Innoviva Strategic Opportunities LLC [Member] | Securities Purchase Agreement Second Tranche [Member]
Class of Stock [Line Items]
Sale of common stock, net of issuance costs (in shares)	5,385,208
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	2,692,604
Proceeds from issuance of common stock and warrants | $	$ 26.9