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Note 6 - Property and Equipment (Details Textual) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Dec. 31, 2018	Aug. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment, Net, Ending Balance			$ 110,184	$ 99,631
Proceeds from Sale of Property, Plant, and Equipment, Total			0	39	$ 141
Monterrey, Mexico Facility [Member]
Proceeds from Sale of Property, Plant, and Equipment, Total	$ 2,700
Gain (Loss) on Disposition of Property Plant Equipment, Total	$ 200
Property in Houston, Texas [Member]
Proceeds from Sale of Property, Plant, and Equipment, Total		$ 5,800
Gain (Loss) on Disposition of Property Plant Equipment, Total		$ 2,800
MEXICO
Property, Plant and Equipment, Net, Ending Balance			$ 20,300	$ 19,800

X

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ 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=121586364&loc=d3e3602-108585

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

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- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(14))
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-Topic 360
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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