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Note 3 - Available-for-sale Securities - Investment Securities in a Continuous Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available-for-sale securities in continuous loss position, less than 12 months, fair value	$ 5,445	$ 8,024
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss	(49)	(38)
Available-for-sale securities in continuous loss position, 12 months or more, fair value	16,828	18,396
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss	(1,274)	(1,184)
Available-for-sale securities in continuous loss position, fair value	22,273	26,420
Available-for-sale securities in continuous loss position, unrealized loss	(1,323)	(1,222)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities in continuous loss position, less than 12 months, fair value	125	8,024
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss		(38)
Available-for-sale securities in continuous loss position, 12 months or more, fair value	4,046	5,422
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss	(56)	(158)
Available-for-sale securities in continuous loss position, fair value	4,171	13,446
Available-for-sale securities in continuous loss position, unrealized loss	(56)	(196)
Corporate Debt Securities [Member]
Available-for-sale securities in continuous loss position, less than 12 months, fair value
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss
Available-for-sale securities in continuous loss position, 12 months or more, fair value	12,782	12,974
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss	(1,218)	(1,026)
Available-for-sale securities in continuous loss position, fair value	12,782	12,974
Available-for-sale securities in continuous loss position, unrealized loss	(1,218)	$ (1,026)
SBA Loan Pools [Member]
Available-for-sale securities in continuous loss position, less than 12 months, fair value	5,320
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss	(49)
Available-for-sale securities in continuous loss position, 12 months or more, fair value
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss
Available-for-sale securities in continuous loss position, fair value	5,320
Available-for-sale securities in continuous loss position, unrealized loss	$ (49)

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

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