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Note 9 - Related Party Transactions (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Shareholder [Member]        
Related Party Transaction, Amounts of Transaction $ 349,000 $ 238,000 $ 558,000 $ 447,000