Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Product sales	$ 86,868	$ 88,579	$ 163,700	$ 176,879
Marketing service fees	14,086	12,406	27,016	24,120
Net sales	100,954	100,985	190,716	200,999
Cost of sales	21,910	25,414	41,249	52,187
Gross profit	79,044	75,571	149,467	148,812
Operating expenses
Sales and marketing	42,946	42,013	87,231	83,184
General and administrative	22,506	18,214	44,075	36,074
Research and development	6,451	6,313	12,296	12,246
Restatements and related costs	2,213	2,327	8,129	10,633
Total operating expenses	74,116	68,867	151,731	142,137
Operating income (loss)	4,928	6,704	(2,264)	6,675
Other income and expense
Interest income (expense), net	74	(492)	(198)	(960)
Other income	853	363	1,544	91
Total other income (expense)	927	(129)	1,346	(869)
Income before income taxes	5,855	6,575	(918)	5,806
Income tax expense	(1,778)	(3,309)	(2,742)	(4,488)
Net income (loss) from continuing operations	4,077	3,266	(3,660)	1,318
Discontinued operations
Loss from discontinued operations	(730)	(5,829)	(1,511)	(6,623)
Income tax benefit	225	1,880	364	2,114
Net loss from discontinued operations	(505)	(3,949)	(1,147)	(4,509)
Net income (loss)	$ 3,572	$ (683)	$ (4,807)	$ (3,191)
Net income (loss) per common share—basic:
Net income (loss) from continuing operations	$ 0.22	$ 0.18	$ (0.20)	$ 0.07
Net loss from discontinued operations	(0.03)	(0.22)	(0.06)	(0.24)
Net income (loss) per common share—basic:	0.19	(0.04)	(0.26)	(0.17)
Net income (loss) per common share—diluted:
Net income (loss) from continuing operations	0.21	0.18	(0.20)	0.07
Net loss from discontinued operations	(0.02)	(0.22)	(0.06)	(0.24)
Net income (loss) per common share—diluted:	$ 0.19	$ (0.04)	$ (0.26)	$ (0.17)
Weighted average number of common shares:
Basic	18,769,415	18,445,348	18,750,804	18,322,185
Diluted	18,989,579	18,621,192	18,750,804	18,435,128
Other comprehensive income (loss):
Unrealized gain (loss) on derivative instruments, net of tax	$ 271	$ (31)	$ 936	$ 72
Foreign currency translation adjustment	1,559	198	(3,301)	574
Comprehensive income (loss)	$ 5,402	$ (516)	$ (7,172)	$ (2,545)