UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net product revenues	$ 80,732	$ 45,609	$ 214,227	$ 103,454
Cost of product sold	14,604	7,890	37,701	17,820
Gross profit	66,128	37,719	176,526	85,634
Operating expenses:
Research and development	11,739	4,230	22,916	11,829
Sales and marketing	16,480	12,601	49,009	38,297
General and administrative	16,856	10,508	45,704	26,280
Total operating expenses	45,075	27,339	117,629	76,406
Operating income	21,053	10,380	58,897	9,228
Loss on debt extinguishment	(26,146)		(26,146)	(22,639)
Other income (expense), net		(1,525)	(15)	(3,071)
Interest expense, net	(5,429)	(6,946)	(19,783)	(20,254)
(Loss) income before income taxes	(10,522)	1,909	12,953	(36,736)
Income tax benefit (expense)	902		(1,070)
Net (loss) income and comprehensive (loss) income	(9,620)	1,909	11,883	(36,736)
Accumulation of dividends on preferred stock		(6,013)		(26,904)
Net (loss) income available to common stockholders	$ (9,620)	$ (4,104)	$ 11,883	$ (63,640)
(LOSS) EARNINGS PER SHARE:
Basic	$ (0.17)	$ (0.14)	$ 0.21	$ (4.15)
Diluted	$ (0.17)	$ (0.14)	$ 0.20	$ (4.15)
Weighted average number of shares of common stock - basic	57,722,163	30,212,959	57,188,101	15,324,362
Weighted average number of shares of common stock - diluted	57,722,163	30,212,959	58,776,158	15,324,362