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Note 6 - Stock Option Plan (Details) - Nonvested Restricted Shares Activity - Jun. 30, 2015 - Restricted Stock [Member] - $ / shares
Total
Note 6 - Stock Option Plan (Details) - Nonvested Restricted Shares Activity [Line Items]  
Granted 19,500
Granted $ 24.50
Vested 500
Vested $ 24.50
Forfeited 1,000
Forfeited $ 24.50
Nonvested at June 30, 2015 18,000
Nonvested at June 30, 2015 $ 24.50