Consolidated Statements Of Operations and Comprehensive Loss (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
NET REVENUE	$ 206,565	$ 194,548	$ 195,827
COST OF GOODS SOLD	140,495	146,177	150,544
GROSS PROFIT	66,070	48,371	45,283
OPERATING EXPENSES:
Research and development	35,332	34,199	31,196
Sales and marketing	13,450	14,133	13,225
General and administrative	11,658	9,695	9,174
Total operating expenses	60,440	58,027	53,595
OPERATING INCOME (LOSS)	5,630	(9,656)	(8,312)
OTHER INCOME:
Interest income (expense), net	(16)	(8)	16
Other income (expense), net	(23)	11	(39)
Total other income (expense), net	(39)	3	(23)
INCOME (LOSS) BEFORE INCOME TAXES AND DISCONTINUED OPERATIONS	5,591	(9,653)	(8,335)
INCOME TAX EXPENSE	51	749	129
INCOME (LOSS) FROM CONTINUING OPERATIONS	5,540	(10,402)	(8,464)
LOSS FROM DISCONTINUED OPERATIONS	(476)	(4,548)	(13,560)
NET INCOME (LOSS)	5,064	(14,950)	(22,024)
NET INCOME (LOSS) PER SHARE:
Loss from continuing operations (in usd per share)	$ 0.09	$ (0.18)	$ (0.15)
Loss from discontinued operations (in usd per share)	$ (0.01)	$ (0.08)	$ (0.25)
Basic and diluted (in usd per share)	$ 0.09	$ (0.26)	$ (0.40)
WEIGHTED AVERAGE SHARES USED TO CALCULATE NET LOSS PER SHARE:
Basic weighted-average common shares outstanding	58,521	56,954	54,908
Diluted weighted-average common shares outstanding	59,247	56,954	54,908
COMPREHENSIVE INCOME (LOSS):
NET INCOME (LOSS)	5,064	(14,950)	(22,024)
Foreign currency translation adjustment	279	129	(78)
Comprehensive income (loss)	$ 5,343	$ (14,821)	$ (22,102)