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Note 9 - Income Taxes (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Income Tax Disclosure [Abstract]          
Unrecognized Tax Benefits $ 170,000   $ 170,000   $ 148,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 35,000   35,000   28,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense 5,000 2,000      
Unrecognized Tax Benefits, Income Tax Penalties Expense     $ 2,000 $ 3,000