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Note 6 - Realignment of Goals and Objectives and New Development Focus (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Restructuring and Related Cost, Expected Cost, Total		$ 9.6
Restructuring Plan [Member]
Payments for Restructuring	$ 5.3
Restructuring Plan [Member] | General and Administrative Expense [Member]
Restructuring Charges, Total	$ 0.5
Restructuring Plan [Member] | Employee Severance [Member]
Restructuring and Related Cost, Expected Cost, Total		5.7
Restructuring Plan [Member] | Accelerated Non-Cash Stock Option Expense [Member]
Restructuring and Related Cost, Expected Cost, Total		$ 3.9

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
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-SubTopic 10
-Section 45
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Amount expected to be recognized in earnings for the specified restructuring cost.

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