Note 7 - Income Taxes (Detail) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Tax Credit Carryforwards	$ 1,773,000	$ 2,135,000
Deferred Tax Assets, Net	9,600,000	10,400,000
Deferred Tax Assets, Valuation Allowance	9,648,000	10,405,000
Operating Loss Carryforwards	19,577,000	19,619,000
Unrecognized Tax Benefits	148,000	116,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	28,000	20,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	7,000	5,000
Unrecognized Tax Benefits, Income Tax Penalties Expense	2,000	0
Prior to Their Acquisition by the Company [Member]
Operating Loss Carryforwards	$ 11,300,000

The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance.

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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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- Definition

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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- Definition

This element represents the recognized expense for the amount of statutory penalties in the period in which the entity claims or expects to claim a tax position, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties or, if not recognizing the expense in the period in which the tax return was initially filed, the expense is generally recognized in the period in which the enterprise's judgment about meeting the minimum statutory threshold changes.

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- Definition

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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