Note 5 - Leases - Lease Cost (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Operating lease cost	$ 253	$ 785
Finance lease interest cost	21	54
Finance lease amortization expense	65	196
Total lease cost	$ 339	1,035
Cash paid for amounts included in the measurement of lease liabilities		$ 555
Operating leases (Year)	7 years 219 days	7 years 219 days
Finance leases (Year)	3 years 146 days	3 years 146 days
Operating leases	4.80%	4.80%
Finance leases	5.40%	5.40%