Note 7 - Income Taxes (Restated) (Details) - Net Deferred Tax Assets (USD $)	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets:
Federal, state and foreign loss carryforwards	$ 3,862,000	$ 6,527,000
Capital loss carryforward	3,570,000
Capitalized research and development		475,000
Deferred revenue	71,000us-gaap_DeferredTaxAssetsDeferredIncome	77,000us-gaap_DeferredTaxAssetsDeferredIncome
Federal and state tax credits	520,000	1,762,000
Other	503,000us-gaap_DeferredTaxAssetsOther	563,000us-gaap_DeferredTaxAssetsOther
Total deferred tax asset	8,526,000us-gaap_DeferredTaxAssetsGross	9,404,000us-gaap_DeferredTaxAssetsGross
Less valuation allowance	(8,526,000)	(9,404,000)
Net deferred tax asset	$ 0us-gaap_DeferredTaxAssetsNet	$ 0us-gaap_DeferredTaxAssetsNet

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