Note 13 - Revenue Recognition - Analysis of Product Sales Allowances and Accruals (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Total gross Rayaldee sales	$ 151,669	$ 173,632	$ 458,429	$ 529,504
Rayaldee [Member]
Disaggregation of Revenue [Line Items]
Balance at beginning	7,683	10,928	9,900	10,920
Provision related to current period sales	7,398	10,098	21,501	29,538
Credits or payments made	(6,897)	(12,349)	(23,217)	(31,781)
Balance at end	8,184	8,677	8,184	8,677
Total gross Rayaldee sales	$ 14,876	$ 15,865	$ 42,515	$ 49,447
Provision for Rayaldee sales allowances and accruals as a percentage of gross Rayaldee sales	50.00%	64.00%	51.00%	60.00%
Chargebacks, Discounts, Rebates and Fees [Member] | Rayaldee [Member]
Disaggregation of Revenue [Line Items]
Balance at beginning	$ 1,240	$ 2,743	$ 2,070	$ 2,578
Provision related to current period sales	3,207	4,005	9,465	12,224
Credits or payments made	(2,793)	(5,058)	(9,881)	(13,112)
Balance at end	1,654	1,690	1,654	1,690
Governmental [Member] | Rayaldee [Member]
Disaggregation of Revenue [Line Items]
Balance at beginning	4,126	5,991	5,365	6,150
Provision related to current period sales	3,894	5,776	11,186	16,325
Credits or payments made	(3,797)	(7,013)	(12,328)	(17,721)
Balance at end	4,223	4,754	4,223	4,754
Sales Returns [Member] | Rayaldee [Member]
Disaggregation of Revenue [Line Items]
Balance at beginning	2,317	2,194	2,465	2,192
Provision related to current period sales	297	317	850	989
Credits or payments made	(307)	(278)	(1,008)	(948)
Balance at end	$ 2,307	$ 2,233	$ 2,307	$ 2,233