Note 13 - Revenue Recognition - Analysis of Product Sales Allowances and Accruals (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended	15 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Sep. 30, 2024
Total gross Rayaldee sales	$ 173,632	$ 178,595	$ 529,504	$ 681,591
Rayaldee [Member]
Balance at beginning	10,928	9,918	10,920	8,278	$ 8,278	$ 9,918
Provision related to current period sales	10,098	8,766	29,538	26,265
Credits or payments made	(12,349)	(8,347)	(31,781)	(24,206)
Balance at end	8,677	10,337	8,677	10,337	10,920	8,677
Total gross Rayaldee sales	$ 15,865	$ 16,090	$ 49,447	$ 47,940
Provision for Rayaldee sales allowances and accruals as a percentage of gross Rayaldee sales	64.00%	54.00%	60.00%	55.00%
Chargebacks, Discounts, Rebates and Fees [Member] | Rayaldee [Member]
Balance at beginning	$ 2,743	$ 2,330	$ 2,578	$ 1,532	1,532	2,330
Provision related to current period sales	4,005	3,446	12,224	10,702
Credits or payments made	(5,058)	(4,125)	(13,112)	(10,583)
Balance at end	1,690	1,651	1,690	1,651	2,578	1,690
Governmental [Member] | Rayaldee [Member]
Balance at beginning	5,991	5,954	6,150	5,063	5,063	5,954
Provision related to current period sales	5,776	4,998	16,325	14,604
Credits or payments made	(7,013)	(4,207)	(17,721)	(12,922)
Balance at end	4,754	6,745	4,754	6,745	6,150	4,754
Sales Returns [Member] | Rayaldee [Member]
Balance at beginning	2,194	1,634	2,192	1,683	1,683	1,634
Provision related to current period sales	317	322	989	959
Credits or payments made	(278)	(15)	(948)	(701)
Balance at end	$ 2,233	$ 1,941	$ 2,233	$ 1,941	$ 2,192	$ 2,233