Note 10 - Leases (Details Textual) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Jan. 01, 2019
Operating Lease, Cost	$ 2	$ 9
Short-term Lease, Cost	$ 1	2
Operating Lease, Payments		$ 11
Operating Lease, Weighted Average Remaining Lease Term	9 years	9 years
Operating Lease, Weighted Average Discount Rate, Percent	6.70%	6.70%
Finance Lease, Weighted Average Remaining Lease Term	2 years 2 months 12 days	2 years 2 months 12 days
Finance Lease, Weighted Average Discount Rate, Percent	4.00%	4.00%
Finance Lease, Right-of-Use Asset			$ 2
Finance Lease, Liability, Total			$ 2
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