Note 6 - Summary of Quantitative Attributes of Operating Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lease cost
Operating lease cost	$ 617
Total lease cost	617
Cash paid for amounts included in the measurement of lease liabilities:
Operating cashflows from operating leases	583
At implementatoin of new accounting guidance:
Right-of-use assets recorded for finance lease liabilities	2,005
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 2,407
Weighted average remaining lease terms:
Operating leases	15 years 7 months 6 days
Weighted average discount rates:
Operating leases	3.11%