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Note 7 - Income Taxes (Detail) - Net Deferred Tax Assets (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Deferred tax assets: |  |
Federal, state and foreign loss carryforwards | $ 6,852 | $ 6,893
Capitalized research and development | 753 | 1,312
Deferred revenue | (76) | (153)
Federal and state tax credits | 1,773 | 2,135
Other | 346 | 219
Total deferred tax asset | 9,648 | 10,405
Less valuation allowance | $ (9,648) | $ (10,405)

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