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Condensed Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Revenue, net $ 14,330 $ 14,700
Cost of revenue (1) 6,521 [1] 8,128 [1]
Gross profit 7,809 6,572
Operating expenses:    
Research and development (2) 5,093 [2] 5,995 [2]
Selling, general and administrative (3) 4,019 [3] 3,834 [3]
Total operating expenses 9,112 9,829
Loss from operations (1,303) (3,257)
Gain on sale of marketable securities 0 264
Interest expense and other, net (98) (166)
Gain on sale of patents 0 1,600
Total other income (expense), net (98) 1,698
Loss before income taxes (1,401) (1,559)
Benefit for income taxes (763) (91)
Net loss $ (638) $ (1,468)
Net loss per share - basic and diluted $ (0.04) $ (0.11)
Weighted average shares outstanding - basic and diluted 18,029 13,569
[1] Includes: Additional amortization of non-cancelable prepaid royalty 132 86 Stock-based compensation 39 27
[2] Stock-based compensation 222 201
[3] Stock-based compensation 241 247