Note 10 - Leases - Lease Cost (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Operating lease costs	$ 397	$ 722
Short-term lease costs	97	205
Total lease costs, included in S&A	$ 494	927
Operating cash flows - cash paid for operating lease liabilities		619
Non-cash - Operating lease ROU assets obtained in exchange for new lease liabilities		$ 514
Weighted-average remaining lease term (in years) (Year)	3 years 292 days	3 years 292 days
Weighted average discount rate	5.65%	5.65%