Note 8 - Restructuring Charges (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill, Impairment Loss	$ 0	$ 8,542	$ 0
Restructuring Charges	1,158	15,573
Zenara [Member]
Restructuring Charges	$ 1,158	15,573
Zenara [Member] \| Restructuring Charges [Member]
Goodwill, Impairment Loss		8,542
Impairment of Intangible Assets, Finite-lived		3,625
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down		$ 1,269

Amount, before tax, of (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a disposal group. Excludes discontinued operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

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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.

+ References

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