CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 68,165	$ 53,647	$ 128,132	$ 115,383
Cost of sales	12,760	8,198	22,401	18,223
Gross profit	55,405	45,449	105,731	97,160
Operating expenses:
Selling, general and administrative	53,599	37,329	99,003	84,270
Investigation, restatement and related	(2,062)	11,446	5,134	27,038
Research and development	4,063	2,259	8,402	4,910
Amortization of intangible assets	215	271	454	542
Operating loss	(410)	(5,856)	(7,262)	(19,600)
Other expense, net
Interest expense, net	(1,371)	(2,574)	(2,844)	(4,961)
Other expense, net	(3)	(9)	(2)	(3)
Loss before income tax provision	(1,784)	(8,439)	(10,108)	(24,564)
Income tax provision benefit (expense)	5	(27)	(53)	11,277
Net loss	(1,779)	(8,466)	(10,161)	(13,287)
Net loss available to common stockholders (Note 8)	$ (3,276)	$ (8,466)	$ (13,126)	$ (13,287)
Net loss per common share - basic (in dollars per share)	$ (0.03)	$ (0.08)	$ (0.12)	$ (0.12)
Net loss per common share - diluted (in dollars per share)	$ (0.03)	$ (0.08)	$ (0.12)	$ (0.12)
Weighted average common shares outstanding - basic (in shares)	110,276,636	108,119,461	109,841,428	108,081,625
Weighted average common shares outstanding - diluted (in shares)	110,276,636	108,119,461	109,841,428	108,081,625