Note 2 - Summary of Quantitative Attributes of Operating Leases (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Lease cost:
Operating lease cost	$ 449
Total lease cost	449
Cash paid for amounts included in the measurement of lease liabilities:
Operating cashflows from operating leases	(431)
Total cash paid for amounts included in the measurement of lease liabilities	(431)
At implementation of new accounting guidance:
Right-of-use assets recorded for operating lease liabilities	2,005
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 2,407
Weighted average remaining lease term:
Operating leases	14 years
Weighted average discount rate:
Operating leases	3.11%