CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS      
Revenue $ 128,511 $ 109,512 $ 93,376
Cost of revenue 64,234 57,225 50,534
Cost of revenue - inventory purchase commitment (380) 1,840  
Gross margin 64,657 50,447 42,842
Operating expenses:      
Research and development 24,979 20,310 19,211
Sales and marketing 21,975 20,182 17,546
General and administrative 12,329 10,150 9,805
Litigation settlement 440 2,869  
Total operating expenses 59,723 53,511 46,562
Income (loss) from operations 4,934 (3,064) (3,720)
Other income (expense):      
Interest income 16 13 4
Interest expense (470) (277) (396)
Other income (expense) (729) (254) 227
Total other income (expense) (1,183) (518) (165)
Income (loss) before income taxes 3,751 (3,582) (3,885)
Income tax expense (248) (141)  
Net income (loss) $ 3,503 $ (3,723) $ (3,885)
Net income (loss) per common share:      
Basic (in dollars per share) $ 0.33 $ (1.58) $ (2.02)
Diluted (in dollars per share) $ 0.16 $ (1.58) $ (2.02)
Weighted-average number of shares:      
Basic (in shares) 10,609 2,360 1,923
Diluted (in shares) 22,263 2,360 1,923