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Note 3 - Securities (Details) - Securities Available-for-Sale with Unrealized Losses - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Securities Available for Sale |  |
Less than 12 Months - Fair Value | $ 31,828 | $ 11,232
Less than 12 Months - Unrealized Loss | (419) | (20)
Fair Value | 39,686 | 27,540
Unrealized Loss | (541) | (240)
12 Months or More - Fair Value | 7,858 | 16,308
12 Months or More - Unrealized Loss | (122) | (220)
US Government-sponsored Enterprises Debt Securities [Member] |  |
Securities Available for Sale |  |
Less than 12 Months - Fair Value | 3,991 |
Less than 12 Months - Unrealized Loss | (13) |
Fair Value | 7,980 | 7,911
Unrealized Loss | (32) | (104)
12 Months or More - Fair Value | 3,989 | 7,911
12 Months or More - Unrealized Loss | (19) | (104)
Mortgage-backed Securities, Issued by Private Enterprises [Member] |  |
Securities Available for Sale |  |
Less than 12 Months - Fair Value | 27,837 | 11,232
Less than 12 Months - Unrealized Loss | (406) | (20)
Fair Value | 31,706 | 19,629
Unrealized Loss | (509) | (136)
12 Months or More - Fair Value | 3,869 | 8,397
12 Months or More - Unrealized Loss | $ (103) | $ (116)

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