Note 7 - Discontinued Operations - Sale of OMIDRIA - Net Income From Discontinued Operations (Details) - Discontinued Operations, Disposed of by Sale [Member] - Omidria Assets Disposal [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest earned on OMIDRIA contract royalty asset	$ 4,343	$ 3,925
Remeasurement adjustments	2,339	1,677
Other income (loss), net	(16)	380
Net income from discontinued operations, net of tax	$ 6,666	$ 5,982