Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Product sales	$ 90,868	$ 86,868	$ 176,493	$ 163,700
Marketing service fees	13,207	14,086	26,261	27,016
Net sales	104,075	100,954	202,754	190,716
Cost of sales	22,515	21,910	44,651	41,249
Gross profit	81,560	79,044	158,103	149,467
Operating expenses
Sales and marketing	46,037	42,946	90,853	87,231
General and administrative	17,954	22,506	34,672	44,075
Research and development	6,792	6,451	14,428	12,296
Restatements and related costs	545	2,213	790	8,129
Charges related to U.S. Government resolutions (Note 11)	12,870		12,870
Total operating expenses	84,198	74,116	153,613	151,731
Operating (loss) income	(2,638)	4,928	4,490	(2,264)
Other income and expense
Interest (expense) income, net	(113)	74	(151)	(198)
Other income, net	147	853	1,980	1,544
Total other income (expense)	34	927	1,829	1,346
(Loss) income before income taxes	(2,604)	5,855	6,319	(918)
Income tax expense	(3,685)	(1,778)	(7,979)	(2,742)
Net (loss) income from continuing operations	(6,289)	4,077	(1,660)	(3,660)
Discontinued operations (Note 11)
Loss from discontinued operations	(1,572)	(730)	(2,562)	(1,511)
Income tax benefit	474	225	728	364
Net loss from discontinued operations	(1,098)	(505)	(1,834)	(1,147)
Net (loss) income	$ (7,387)	$ 3,572	$ (3,494)	$ (4,807)
Net income (loss) per common share—basic:
Net (loss) income from continuing operations	$ (0.35)	$ 0.22	$ (0.09)	$ (0.20)
Net loss from discontinued operations	(0.06)	(0.03)	(0.10)	(0.06)
Net (loss) income per common share—basic	(0.41)	0.19	(0.19)	(0.26)
Net income (loss) per common share—diluted:
Net (loss) income from continuing operations	(0.35)	0.21	(0.09)	(0.20)
Net loss from discontinued operations	(0.06)	(0.02)	(0.10)	(0.06)
Net (loss) income per common share—diluted	$ (0.41)	$ 0.19	$ (0.19)	$ (0.26)
Weighted average number of common shares:
Basic	18,147,681	18,769,415	18,312,781	18,750,804
Diluted	18,147,681	18,989,579	18,312,781	18,750,804
Other comprehensive income (loss):
Unrealized gain on derivative instruments, net of tax	$ 50	$ 271	$ 76	$ 936
Unrealized loss on debt securities, net of tax	(1,942)		(2,469)
Foreign currency translation adjustment	(570)	1,559	651	(3,301)
Comprehensive (loss) income	$ (9,849)	$ 5,402	$ (5,236)	$ (7,172)