UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net product revenues	$ 107,028	$ 73,821	$ 192,341	$ 133,495
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Sales-based, Trademark and Tiered Royalties	Sales-based, Trademark and Tiered Royalties	Sales-based, Trademark and Tiered Royalties	Sales-based, Trademark and Tiered Royalties
Cost of product sold	$ 18,921	$ 12,687	$ 33,637	$ 23,097
Cost, Product and Service [Extensible Enumeration]	Sales-based, Trademark and Tiered Royalties	Sales-based, Trademark and Tiered Royalties	Sales-based, Trademark and Tiered Royalties	Sales-based, Trademark and Tiered Royalties
Gross profit	$ 88,107	$ 61,134	$ 158,704	$ 110,398
Operating expenses:
Research and development	12,668	6,498	20,246	11,177
Sales and marketing	20,160	17,022	37,743	32,529
General and administrative	22,163	14,302	40,043	28,848
Total operating expenses	54,991	37,822	98,032	72,554
Operating income	33,116	23,312	60,672	37,844
Other expense, net	42	4	40	(15)
Interest expense, net	(3,927)	(7,227)	(8,096)	(14,354)
Income before income taxes	29,231	16,089	52,616	23,475
Income tax expense	(5,700)	(1,972)	(7,600)	(1,972)
Net income	23,531	14,117	45,016	21,503
Unrealized loss on investments	(29)		(29)
Comprehensive income	$ 23,502	$ 14,117	$ 44,987	$ 21,503
EARNINGS PER SHARE:
Basic	$ 0.40	$ 0.25	$ 0.76	$ 0.38
Diluted	$ 0.39	$ 0.24	$ 0.74	$ 0.37
Weighted average number of shares of common stock - basic	59,063,358	56,940,840	58,986,370	56,916,282
Weighted average number of shares of common stock - diluted	60,922,672	58,592,876	60,759,026	58,635,195