Note 13 - Revenue Recognition - Analysis of Product Sales Allowances and Accruals (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Total gross Rayaldee sales	$ 149,952	$ 173,686
Rayaldee [Member]
Balance at beginning	9,900	10,920
Provision related to current period sales	6,781	8,255
Credits or payments made	(9,124)	(9,991)
Balance at end	7,557	9,184
Total gross Rayaldee sales	$ 13,110	$ 15,157
Provision for Rayaldee sales allowances and accruals as a percentage of gross Rayaldee sales	52.00%	54.00%
Chargebacks, Discounts, Rebates and Fees [Member] | Rayaldee [Member]
Balance at beginning	$ 2,070	$ 2,578
Provision related to current period sales	3,085	3,820
Credits or payments made	(3,927)	(3,904)
Balance at end	1,228	2,494
Governmental [Member] | Rayaldee [Member]
Balance at beginning	5,365	6,150
Provision related to current period sales	3,434	4,132
Credits or payments made	(4,948)	(5,807)
Balance at end	3,851	4,475
Sales Returns [Member] | Rayaldee [Member]
Balance at beginning	2,465	2,192
Provision related to current period sales	262	303
Credits or payments made	(249)	(280)
Balance at end	$ 2,478	$ 2,215