Note 5 - Leases - Lease Cost (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Operating lease cost	$ 253	$ 532
Finance lease interest cost	16	33
Finance lease amortization expense	66	131
Total lease cost	$ 335	696
Cash paid for amounts included in the measurement of lease liabilities		200
Right-of-use assets obtained in exchange for lease obligations
Operating leases (Year)	8 years 36 days	8 years 36 days
Finance leases (Year)	3 years 182 days	3 years 182 days
Operating leases	4.80%	4.80%
Finance leases	5.40%	5.40%