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Note 5 - Fair Value of Financial Instruments (Details Textual) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Trade Receivables Held-for-sale, Net, Not Part of Disposal Group $ 15.5 $ 18.9
Allowance for Doubtful Accounts Receivable 0.1 0.2
Accounts Payable $ 0.4 $ 0.4