Note 8 - Accrued Expenses (Details Textual) $ in Thousands	9 Months Ended
Sep. 30, 2019 USD ($)
Restructuring Charges, Total	$ 1,651
Facility Closing [Member]
Restructuring Charges, Total	$ 1,100

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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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration