Condensed Consolidated Statements of Operations and Comprehensive (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Product sales	$ 87,761	$ 88,296	$ 251,461	$ 265,175
Marketing service fees	13,390	12,698	40,406	36,818
Net sales	101,151	100,994	291,867	301,993
Cost of sales	23,865	25,268	65,114	77,455
Gross profit	77,286	75,726	226,753	224,538
Operating expenses
Sales and marketing	46,129	40,998	133,360	124,182
General and administrative	19,348	19,322	63,423	55,396
Research and development	6,523	6,572	18,819	18,818
Restatements and related costs	1,147	2,326	9,276	12,959
Total operating expenses	73,147	69,218	224,878	211,355
Operating income	4,139	6,508	1,875	13,183
Other income and expense
Interest expense, net	(125)	(395)	(323)	(1,355)
Other expense, net	(1,736)	(1,322)	(192)	(1,231)
Total other income (expense)	(1,861)	(1,717)	(515)	(2,586)
Income before income taxes	2,278	4,791	1,360	10,597
Income tax expense	(3,066)	(4,763)	(5,808)	(9,251)
Net (loss) income from continuing operations	(788)	28	(4,448)	1,346
Discontinued operations
(Loss) income from discontinued operations	(804)	260	(2,315)	(6,363)
Income tax benefit	221	164	585	2,278
Net (loss) income from discontinued operations	(583)	424	(1,730)	(4,085)
Net (loss) income	$ (1,371)	$ 452	$ (6,178)	$ (2,739)
Net (loss) income per common share—basic:
Net (loss) income from continuing operations	$ (0.04)		$ (0.24)	$ 0.07
Net (loss) income from discontinued operations	(0.03)	$ 0.02	(0.09)	(0.22)
Net (loss) income per common share—basic:	(0.07)	0.02	(0.33)	(0.15)
Net (loss) income per common share—diluted:
Net (loss) income from continuing operations	(0.04)		(0.24)	0.07
Net (loss) income from discontinued operations	(0.03)	0.02	(0.09)	(0.22)
Net (loss) income per common share—diluted:	$ (0.07)	$ 0.02	$ (0.33)	$ (0.15)
Weighted average number of common shares:
Basic	18,855,533	18,577,540	18,785,696	18,408,238
Diluted	18,855,533	18,773,386	18,785,696	18,564,522
Other comprehensive loss:
Unrealized (loss) gain on derivative instruments, net of tax	$ (706)	$ 112	$ 230	$ 184
Foreign currency translation adjustment	(365)	(3,302)	(3,666)	(2,728)
Comprehensive loss	$ (2,442)	$ (2,738)	$ (9,614)	$ (5,283)