CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 53,647	$ 67,437	$ 115,383	$ 133,992
Cost of sales	8,198	9,749	18,223	17,167
Gross profit	45,449	57,688	97,160	116,825
Operating expenses:
Selling, general and administrative	37,329	50,641	84,270	101,503
Investigation, restatement and related	11,446	21,025	27,038	39,132
Research and development	2,259	2,828	4,910	5,730
Amortization of intangible assets	271	267	542	500
Impairment of intangible assets	0	0	0	446
Operating loss	(5,856)	(17,073)	(19,600)	(30,486)
Other (expense) income, net
Interest expense, net	(2,574)	(269)	(4,961)	(58)
Other (expense) income, net	(9)	174	(3)	145
Loss before income tax provision	(8,439)	(17,168)	(24,564)	(30,399)
Income tax provision (expense) benefit	(27)	(42)	11,277	(84)
Net loss	$ (8,466)	$ (17,210)	$ (13,287)	$ (30,483)
Net loss per common share - basic (in dollars per share)	$ (0.08)	$ (0.16)	$ (0.12)	$ (0.29)
Net loss per common share - diluted (in dollars per share)	$ (0.08)	$ (0.16)	$ (0.12)	$ (0.29)
Weighted average shares outstanding - basic (in shares)	108,119,461	106,942,429	108,081,625	106,885,893
Weighted average shares outstanding - diluted (in shares)	108,119,461	106,942,429	108,081,625	106,885,893