Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenue	$ 46,767	$ 65,135
Cost of goods sold	12,839	27,461
Gross profit	33,928	37,674
Operating costs:
Sales and marketing	13,964	9,793
Research and development	6,298	4,549
General and administrative	8,327	6,119
Amortization of purchased intangible assets	2,224	1,136
Total operating costs	30,813	21,597
Operating income	3,115	16,077
Interest income	109	80
Other income (expense), net	361	(277)
Income from continuing operations before income taxes	3,585	15,880
Provision for income taxes	1,386	2,223
Net income from continuing operations	2,199	13,657
Loss from discontinued operations	0	(23)
Net income	$ 2,199	$ 13,634
Basic income (loss) per share
Continuing	$ 0.06	$ 0.34
Discontinued	0.00	0.00
Total	0.06	0.34
Diluted income (loss) per share
Continuing	0.06	0.34
Discontinued	0.00	0.00
Total	$ 0.06	$ 0.34
Weighted average common shares outstanding:
Basic	39,681	39,527
Diluted	39,755	39,660