Note 11 - Restructuring (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 31, 2019	Sep. 30, 2020
Restructuring Charges, Total	$ 8,800	$ 858
Restructuring Reserve, Ending Balance	882	584
Accrued Expense [Member]
Restructuring Reserve, Ending Balance		600
Inventory Write Down [Member] \| Cost of Sales [Member]
Restructuring Charges, Total	7,400
Employee Severance [Member]
Restructuring Charges, Total		$ 900
Employee Severance [Member] \| Restructuring and Other Charges [Member]
Restructuring Charges, Total	$ 1,400

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration