Note 13 - Revenue Recognition - Analysis of Product Sales Allowances and Accruals (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Total gross Rayaldee sales	$ 156,807	$ 182,186	$ 306,759	$ 355,872
Rayaldee [Member]
Disaggregation of Revenue [Line Items]
Balance at beginning	7,557	9,184	9,900	10,920
Provision related to current period sales	7,322	11,184	14,103	19,439
Credits or payments made	(7,196)	(9,440)	(16,320)	(19,431)
Balance at end	7,683	10,928	7,683	10,928
Total gross Rayaldee sales	$ 14,528	$ 18,424	$ 27,638	$ 33,582
Provision for Rayaldee sales allowances and accruals as a percentage of gross Rayaldee sales	50.00%	61.00%	51.00%	58.00%
Chargebacks, Discounts, Rebates and Fees [Member] | Rayaldee [Member]
Disaggregation of Revenue [Line Items]
Balance at beginning	$ 1,228	$ 2,494	$ 2,070	$ 2,578
Provision related to current period sales	3,173	4,400	6,258	8,219
Credits or payments made	(3,161)	(4,151)	(7,088)	(8,054)
Balance at end	1,240	2,743	1,240	2,743
Governmental [Member] | Rayaldee [Member]
Disaggregation of Revenue [Line Items]
Balance at beginning	3,851	4,475	5,365	6,150
Provision related to current period sales	3,858	6,416	7,292	10,548
Credits or payments made	(3,583)	(4,900)	(8,531)	(10,707)
Balance at end	4,126	5,991	4,126	5,991
Sales Returns [Member] | Rayaldee [Member]
Disaggregation of Revenue [Line Items]
Balance at beginning	2,478	2,215	2,465	2,192
Provision related to current period sales	291	368	553	672
Credits or payments made	(452)	(389)	(701)	(670)
Balance at end	$ 2,317	$ 2,194	$ 2,317	$ 2,194