CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS        
Revenue $ 33,641 $ 28,605 $ 92,755 $ 78,847
Cost of revenue 16,592 14,918 46,129 41,710
Cost of revenue - inventory purchase commitment   1,840 (180) 1,840
Gross margin 17,049 11,847 46,806 35,297
Operating expenses:        
Research and development 6,409 5,158 18,670 15,119
Sales and marketing 5,596 5,333 16,597 15,479
General and administrative 2,847 2,471 8,623 7,666
Litigation settlement 200 2,869 440 2,869
Total operating expenses 15,052 15,831 44,330 41,133
Income (loss) from operations 1,997 (3,984) 2,476 (5,836)
Other income (expense):        
Interest income 4 2 8 11
Interest expense (209) (65) (420) (209)
Other income (expense) 42 (45) (699) (222)
Total other income (expense) (163) (108) (1,111) (420)
Income (loss) before income taxes 1,834 (4,092) 1,365 (6,256)
Income tax expense (103) 0 (132) 0
Net income (loss) $ 1,731 $ (4,092) $ 1,233 $ (6,256)
Net income (loss) per common share:        
Basic (in dollars per share) $ 0.12 $ (1.73) $ 0.19 $ (2.69)
Diluted (in dollars per share) $ 0.07 $ (1.73) $ 0.06 $ (2.69)
Weighted-average number of shares:        
Basic (in shares) 14,389 2,363 6,511 2,324
Diluted (in shares) 23,556 2,363 21,206 2,324