Revenue Recognition - Schedule of Product Sales Allowances and Accruals (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Provision related to current period sales	$ 85,200	$ 87,600
Total revenues	237,577,000	329,219,000
Rayaldee
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	8,278,000	10,152,000
Provision related to current period sales	7,637,000	8,353,000
Credits or payments made	(7,525,000)	(9,302,000)
Ending balance	8,390,000	9,203,000
Total revenues	$ 14,281,000	$ 13,479,000
Provision for Rayaldee sales allowances and accruals as a percentage of gross Rayaldee sales	53.00%	62.00%
Chargebacks, Discounts, Rebates And Fees | Rayaldee
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 1,532,000	$ 2,014,000
Provision related to current period sales	3,306,000	3,215,000
Credits or payments made	(3,264,000)	(3,641,000)
Ending balance	1,574,000	1,588,000
Governmental | Rayaldee
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	5,063,000	5,499,000
Provision related to current period sales	4,045,000	4,869,000
Credits or payments made	(3,968,000)	(5,086,000)
Ending balance	5,140,000	5,282,000
Sales Returns | Rayaldee
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,683,000	2,639,000
Provision related to current period sales	286,000	269,000
Credits or payments made	(293,000)	(575,000)
Ending balance	$ 1,676,000	$ 2,333,000