CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 59,967	$ 61,736
Cost of sales	9,641	10,025
Gross profit	50,326	51,711
Operating expenses:
Selling, general and administrative	45,404	46,942
Investigation, restatement and related	7,196	15,592
Research and development	4,339	2,650
Amortization of intangible assets	239	271
Operating loss	(6,852)	(13,744)
Other expense, net
Interest expense, net	(1,472)	(2,387)
Other income, net	0	6
Loss before income tax provision	(8,324)	(16,125)
Income tax provision (expense) benefit	(58)	11,304
Net loss	(8,382)	(4,821)
Net loss available to common stockholders (Note 9)	$ (9,850)	$ (4,821)
Net loss per common share - basic (in dollars per share)	$ (0.09)	$ (0.04)
Net loss per common share - diluted (in dollars per share)	$ (0.09)	$ (0.04)
Weighted average common shares outstanding - basic (in shares)	109,401,383	107,538,509
Weighted average common shares outstanding - diluted (in shares)	109,401,383	107,538,509