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Note 6 - Property and Equipment - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property and equipment, at cost	$ 434,579	$ 417,124
Financing lease	3,582	613
Accumulated depreciation	(277,379)	(260,331)
Net property and equipment	$ 157,200	156,793
Minimum [Member]
Depreciable lives (Year)	2 years
Maximum [Member]
Depreciable lives (Year)	30 years
Land [Member]
Property and equipment, at cost	$ 15,698	16,046
Land Improvements [Member]
Property and equipment, at cost	$ 3,742	3,675
Land Improvements [Member] | Minimum [Member]
Depreciable lives (Year)	5 years
Land Improvements [Member] | Maximum [Member]
Depreciable lives (Year)	10 years
Building and Building Improvements [Member]
Property and equipment, at cost	$ 148,507	142,663
Building and Building Improvements [Member] | Minimum [Member]
Depreciable lives (Year)	7 years
Building and Building Improvements [Member] | Maximum [Member]
Depreciable lives (Year)	30 years
Machinery and Equipment [Member]
Property and equipment, at cost	$ 222,802	213,994
Machinery and Equipment [Member] | Minimum [Member]
Depreciable lives (Year)	2 years
Machinery and Equipment [Member] | Maximum [Member]
Depreciable lives (Year)	15 years
Furniture and Fixtures [Member]
Property and equipment, at cost	$ 6,699	6,493
Furniture and Fixtures [Member] | Minimum [Member]
Depreciable lives (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Depreciable lives (Year)	7 years
Software and Software Development Costs [Member]
Property and equipment, at cost	$ 28,977	28,653
Depreciable lives (Year)	5 years
Software and Software Development Costs [Member] | Minimum [Member]
Depreciable lives (Year)	2 years
Software and Software Development Costs [Member] | Maximum [Member]
Depreciable lives (Year)	5 years
Vehicles [Member]
Property and equipment, at cost	$ 2,504	2,272
Vehicles [Member] | Minimum [Member]
Depreciable lives (Year)	2 years
Vehicles [Member] | Maximum [Member]
Depreciable lives (Year)	5 years
Construction in Progress [Member]
Property and equipment, at cost	$ 2,068	$ 2,715

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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-Publisher FASB
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-Topic 360
-SubTopic 10
-Section 50
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- Definition

Amount, before accumulated amortization, of right-of-use asset from finance lease.

+ References

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-Publisher FASB
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- Definition

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

+ References

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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
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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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