Note 2 - Summary of Quantitative Attributes of Operating and Finance Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Finance lease cost:
Amortization of right-of-use assets	$ 96
Interest on lease liabilities	1
Finance lease cost	97
Operating lease cost	28
Total lease cost	125
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	(1)
Operating cashflows from operating leases	(27)
Financing cash flows from finance liabilities	(106)
Total cash paid for amounts included in the measurement of lease liabilities	(134)
At implementation of new accounting guidance:
Right-of-use assets recorded for finance lease liabilities	1,700
Right-of-use assets recorded for operating lease liabilities	$ 304
Weighted average remaining lease terms:
Finance leases	9 years 2 months 12 days
Operating leases	3 years 10 months 24 days
Weighted average discount rates:
Finance leases	3.30%
Operating leases	2.93%