Note 10 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Finance lease cost:
Amortization of right-of-use assets	$ 19	$ 39
Interest on lease liabilities	68	136
Operating lease costs	1,955	3,910
Total lease cost	$ 2,042	$ 4,085