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Note 18 - Restructuring (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Restructuring Costs, Total | $ 177 | $ 1,775 |  | $ 624 | $ 4,732
Scenario, Forecast [Member] |  |  |  |  |
Restructuring Costs, Total |  |  | $ 1,000 |  |

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- Definition Amount, after cash payment, 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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_RestructuringCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |