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Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Income Statement [Abstract] |  |
Revenues | $ 40,195 | $ 42,177
Cost of revenues | 4,777 | 3,985
Gross profit | 35,418 | 38,192
Operating expenses: |  |
Sales and marketing | 17,843 | 19,659
General and administrative | 10,578 | 10,497
Total operating expenses | 28,421 | 30,156
Income from operations | 6,997 | 8,036
Other income | 122 | 31
Income before income taxes | 7,119 | 8,067
Income taxes | 2,481 | 2,472
Net income | $ 4,638 | $ 5,595
Basic net income (loss) per share (in dollars per share) | $ 0.31 | $ 0.36
Diluted net income per share | $ 0.31 | $ 0.36
Shares used in computing basic net income (loss) per share (in shares) | 14,880 | 15,362
Shares used in computing diluted net income (loss) per share (in shares) | 14,970 | 15,371

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