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Note 15 - Income Taxes (Detail) - Deferred Tax Assets (Liabilities) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Net operating loss	$ 50,515,000	$ 48,820,000
Property and equipment	(2,447,000)	(2,999,000)
Stock options and warrants	7,960,000	7,916,000
Other	1,269,000	691,000
Total deferred tax assets	57,297,000	54,428,000
Valuation allowance	(57,297,000)	(54,428,000)
Net deferred tax assets	$ 0	$ 0

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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