Note 1 - Basis of Presentation (Details Textual) $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2019 USD ($) shares	Dec. 31, 2018 USD ($)
Common Stock, Capital Shares Reserved for Future Issuance \| shares	471,000
Europe [Member]
Restructuring and Related Cost, Number of Subsidiaries Eliminated	2
Restructuring Charges, Total \| $	$ 3	$ 3

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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