Note 13 - Income Taxes (Detail) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Unrecognized Tax Benefits	$ 1,409,000	$ 1,337,000	$ 1,466,000	$ 1,761,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	1,000,000	1,300,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	49,000	51,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	2,294	78,748	4,348
Unrecognized Tax Benefits, Income Tax Penalties Accrued	$ 0

This element represents the amount of statutory penalties accrued as of the date of the statement of financial position 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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This element represents the amount of interest expense accrued as of the date of the statement of financial position 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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- 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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