Note 6 - Business Combination - Schedule of Business Acquisitions, by Acquisition (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Goodwill	$ 13,873	$ 13,714
Emerald Medical Services and Emerald Extrusion Services [Member]
Current assets	3,161
Property, plant and equipment	360
Intangible assets	6,400
Goodwill	4,321
Noncurrent assets	169
Current liabilities	(1,105)
Noncurrent liabilities	(1,491)
Total consideration paid	$ 11,815

Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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