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Note 10 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Balances of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Balance	$ 244,670	$ 211,551
Balance	245,879	244,670
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Balance	(586)	(502)
Other comprehensive income (loss) before reclassifications	(521)	(83)
Amounts reclassified from accumulated other comprehensive income (loss)	61	(1)
Net current period other comprehensive income (loss)	(460)	(84)
Balance	(1,046)	(586)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance		5
Other comprehensive income (loss) before reclassifications	(380)	163
Amounts reclassified from accumulated other comprehensive income (loss)	312	(168)
Net current period other comprehensive income (loss)	(68)	(5)
Balance	(68)
AOCI Attributable to Parent [Member]
Balance	(586)	(497)
Other comprehensive income (loss) before reclassifications	(901)	80
Amounts reclassified from accumulated other comprehensive income (loss)	373	(169)
Net current period other comprehensive income (loss)	(528)	(89)
Balance	$ (1,114)	$ (586)

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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