CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 64,303	$ 88,863	$ 179,686	$ 222,855
Cost of sales	10,289	13,205	28,513	30,372
Gross profit	54,014	75,658	151,173	192,483
Operating expenses:
Selling, general and administrative	48,046	51,258	132,316	152,761
Investigation, restatement and related	12,027	7,242	39,065	46,374
Research and development	3,372	2,691	8,281	8,421
Amortization of intangible assets	276	269	818	769
Impairment of intangible assets	0	0	0	446
Operating (loss) income	(9,707)	14,198	(29,307)	(16,288)
Other (expense) income, net
Loss on extinguishment of debt	(8,201)	0	(8,201)	0
Interest expense, net	(1,472)	(2,255)	(6,433)	(2,313)
Other income (expense), net	1	127	(2)	272
(Loss) income before income tax provision	(19,379)	12,070	(43,943)	(18,329)
Income tax provision (expense) benefit	(38)	309	11,239	225
Net (loss) income	(19,417)	12,379	(32,704)	(18,104)
Net (loss) income available to common stockholders (Note 9)	$ (51,982)	$ 12,379	$ (65,269)	$ (18,104)
Net loss per common share - basic (in dollars per share)	$ (0.48)	$ 0.12	$ (0.60)	$ (0.17)
Net loss per common share - diluted (in dollars per share)	$ (0.48)	$ 0.11	$ (0.60)	$ (0.17)
Weighted average shares outstanding - basic (in shares)	108,493,208	107,157,561	108,222,419	106,929,643
Weighted average shares outstanding - diluted (in shares)	108,493,208	109,590,008	108,222,419	106,929,643