Note 12 - Operating Leases - Lease Expense and Other Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Operating lease cost	$ 522
Short-term lease cost	2
Variable Lease Cost	52
Total lease cost	576
Operating cash flows from operating leases	$ 497
Weighted-average remaining lease term (in years) (Year)	17 years 219 days
Weighted-average discount rate	4.10%