Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Product sales, net	$ 37,869	$ 37,202	$ 73,189	$ 70,370
Promotion services	1,122	744	2,301	1,144
Total net revenues	38,991	37,946	75,490	71,514
Operating expenses:
Cost of product sales	5,712	5,681	11,525	10,278
Sales and marketing	14,432	13,317	26,784	24,673
Research and development	4,765	6,581	6,232	7,669
General and administrative	8,129	6,424	15,572	13,468
SEC settlement expense		10,800		10,800
Total operating expenses	33,038	42,803	60,113	66,888
Income (loss) from operations	5,953	(4,857)	15,377	4,626
Non-operating income (expense):
Interest and investment income	263	250	522	362
Other income (expense), net	(249)	39	(121)	(24)
Income (loss) before provision (benefit) for income tax	5,967	(4,568)	15,778	4,964
Provision (benefit) for income tax	(371)	(546)	1,576	24
Net income (loss)	$ 6,338	$ (4,022)	$ 14,202	$ 4,940
Basic net income (loss) per share	$ 0.13	$ (0.08)	$ 0.29	$ 0.10
Diluted net income (loss) per share	$ 0.12	$ (0.08)	$ 0.27	$ 0.09
Weighted average shares used in computing:
Basic net income (loss) per share	49,897	49,929	49,743	49,947
Diluted net income (loss) per share	52,819	49,929	52,405	52,426