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Note 3 - Investment Securities (Details) - Investment Securities Available for Sale - Jun. 30, 2015
$ in Thousands
USD ($)
Continuous loss position less than twelve months:  
Number of Investment Positions 48
Fair Value $ 32,157
Gross Unrealized Losses $ 298
Continuous loss position more than twelve months:  
Number of Investment Positions 19
Fair Value $ 14,325
Gross Unrealized Losses $ 221
Total securities available for sale 67
Total securities available for sale $ 46,482
Total securities available for sale $ 519
US Government Agencies Debt Securities [Member]  
Continuous loss position less than twelve months:  
Number of Investment Positions 9
Fair Value $ 7,696
Gross Unrealized Losses $ 53
Continuous loss position more than twelve months:  
Number of Investment Positions 1
Fair Value $ 999
Gross Unrealized Losses $ 3
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]  
Continuous loss position less than twelve months:  
Number of Investment Positions 22
Fair Value $ 17,893
Gross Unrealized Losses $ 150
Continuous loss position more than twelve months:  
Number of Investment Positions 4
Fair Value $ 4,426
Gross Unrealized Losses $ 53
Municipal Notes [Member]  
Continuous loss position less than twelve months:  
Number of Investment Positions 17
Fair Value $ 6,568
Gross Unrealized Losses $ 95
Continuous loss position more than twelve months:  
Number of Investment Positions 5
Fair Value $ 2,306
Gross Unrealized Losses $ 84
Agency Collateralized Mortgage Obligations [Member]  
Continuous loss position more than twelve months:  
Number of Investment Positions 9
Fair Value $ 6,594
Gross Unrealized Losses $ 81