Note 15 - Commitments and Contingent Liabilities (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Loss Contingency Accrual, Ending Balance	$ 350
Standby Letters of Credit [Member] | Minimum [Member]
Guarantee Obligations, Agreement Term	30 days
Standby Letters of Credit [Member] | Maximum [Member]
Guarantee Obligations, Agreement Term	2 years