CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net sales	$ 166,498	$ 161,624	$ 152,124	$ 118,119	$ 93,195	$ 89,447	$ 55,260	$ 44,348	$ 598,365	$ 282,250
Cost of sales:
Cost of product (excluding amortization)	32,695	32,462	29,324	22,073	17,375	24,569	21,186	33,481	116,554	96,611
Amortization of patented formulations	1,590	1,680	2,268	2,451	1,485	2,102	1,658	807	7,989	6,052
Total cost of sales	34,285	34,142	31,592	24,524	18,860	26,671	22,844	34,288	124,543	102,663
Gross profit	132,213	127,482	120,532	93,595	74,335	62,776	32,416	10,060	473,822	179,587
Operating expenses:
Selling, general, and administrative	23,555	30,257	33,786	11,280	13,879	8,215	9,621	5,455	98,878	37,170
Amortization of other intangibles	10,243	10,182	10,183	10,182	10,182	10,182	10,182	9,279	40,790	39,825
Acquisition costs	0	0	0	0	0	488	0	16,011	0	16,499
Total operating expenses	33,798	40,439	43,969	21,462	24,061	18,885	19,803	30,745	139,668	93,494
Operating income	98,415	87,043	76,563	72,133	50,274	43,891	12,613	(20,685)	334,154	86,093
Interest expense	(15,096)	(14,987)	(15,563)	(15,502)	(10,068)	(9,794)	(10,072)	(8,711)	(61,148)	(38,645)
Other income (expense), net
Tax receivable agreement liability adjustment	3,615	0	0	0	0	0	0	0	3,615	0
Other expense, net	(595)	(213)	(157)	(47)	(35)	(29)	(93)	(33)	(1,012)	(190)
Other income (expense), net	3,020	(213)	(157)	(47)	(35)	(29)	(93)	(33)	2,603	(190)
Income before provision for income taxes	86,339	71,843	60,843	56,584	40,171	34,068	2,448	(29,429)	275,609	47,258
Income tax provision	17,028	15,252	11,492	11,053	6,783	5,753	413	(4,969)	54,825	7,980
Net income	69,311	56,591	49,351	45,531	33,388	28,315	2,035	(24,460)	220,784	39,278
Comprehensive income	$ 69,311	$ 56,591	$ 49,351	$ 45,531	$ 33,388	$ 28,315	$ 2,035	$ (24,460)	$ 220,784	$ 39,278
Net income per share:
Net income (loss) per share: Basic (in usd per share)	$ 0.11	$ 0.09	$ 0.08	$ 0.07	$ 0.05	$ 0.04	$ 0	$ (0.04)	$ 0.34	$ 0.06
Net income (loss) per share: Diluted (in usd per share)	$ 0.10	$ 0.08	$ 0.08	$ 0.07	$ 0.05	$ 0.04	$ 0	$ (0.04)	$ 0.32	$ 0.06
Weighted average common shares outstanding:
Weighted average common shares outstanding: Basic (in shares)	648,422,232	648,124,642	648,124,642	647,994,569	647,888,387	647,888,387	647,775,891	597,212,079	648,166,472	635,386,219
Weighted average common shares outstanding: Diluted (in shares)	692,863,933	690,711,782	656,745,557	656,268,316	655,736,276	653,036,893	647,775,891	597,212,079	689,923,792	636,819,975