v2.4.0.8

Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Deferred tax assets |  |
Net operating loss carryforwards | $ 18,894 | $ 19,658
Research and development credit carryforwards | 5,189 | 4,055
Accrued liabilities | 581 | 535
Deferred revenues | 3,188 | 3,085
Deferred rent | 210 | 153
Intangible assets | 440 | 385
Stock-based compensation | 1,714 | 843
Foreign | 0 | 4
Other | 521 | 403
Gross deferred tax assets | 30,737 | 29,121
Valuation allowance | (27,181) | (26,257)
Net deferred tax assets | 3,556 | 2,864
Deferred tax liabilities |  |
Fixed assets | (3,484) | (2,854)
Intangible assets | (34) | (27)
Total deferred tax liabilities | (3,518) | (2,881)
Net deferred tax assets (liabilities) | $ 38 | $ (17)

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