Note 10 - Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019
Operating Lease, Cost	$ 3,000	$ 6,000
Short-term Lease, Cost	$ 0	1,000
Operating Lease, Payments		$ 7,000
Operating Lease, Weighted Average Remaining Lease Term	10 years 6 months	10 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	6.75%	6.75%
Finance Lease, Weighted Average Remaining Lease Term	2 years 3 months 18 days	2 years 3 months 18 days
Finance Lease, Weighted Average Discount Rate, Percent	4.25%	4.25%
Finance Lease, Liability, Total			$ 2,000
Finance Lease, Right-of-Use Asset			$ 2,000
Minimum [Member]
Lessee, Term of Contract		1 year
Lessee, Lease, Renewal Term		1 year
Maximum [Member]
Lessee, Term of Contract		99 years
Lessee, Lease, Renewal Term		20 years