Note 5 - Leases - Lease Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating lease cost	$ 1,014
Finance lease interest cost	69
Finance lease amortization expense	306
Total lease cost	1,389
Cash paid for amounts included in the measurement of lease liabilities	777
Right-of-use assets obtained in exchange for lease obligations	$ 5,731
Operating leases (Year)	7 years 292 days
Finance leases (Year)	3 years 255 days
Operating leases	4.80%
Finance leases	5.30%