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Note 2 - Investment Securities - Securities Held to Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Securities held to maturity, Unrealized Losses	$ 0	$ (2)
Securities held to maturity, Fair Value	25,288	47,266
Securities held to maturity	25,216	47,133
Securities held to maturity, Unrealized Gains	72	135
US Government Agencies Debt Securities [Member]
Securities held to maturity, Unrealized Losses
Securities held to maturity, Fair Value	18,015	36,865
Securities held to maturity	17,961	36,741
Securities held to maturity, Unrealized Gains	54	124
Corporate Debt Securities [Member]
Securities held to maturity, Unrealized Losses		(2)
Securities held to maturity, Fair Value	7,273	10,401
Securities held to maturity	7,255	10,392
Securities held to maturity, Unrealized Gains	$ 18	$ 11

X

- Definition

Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of accumulated unrealized gain on investments in debt securities classified as held-to-maturity.

+ References

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