Note 17 - Quarterly Consolidated Financial Data (Unaudited) (Details Textual) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019
Restructuring Charges, Total	$ 1,078	$ 161	$ 38	$ 8	$ 17	$ 223

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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