Note 4 - Property and Equipment (Details) - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Land [Member]
Property and equipment, at cost	$ 16,001,000	$ 16,001,000
Land Improvements [Member] \| Minimum [Member]
Depreciable lives	5 years
Land Improvements [Member] \| Maximum [Member]
Depreciable lives	10 years
Land Improvements [Member]
Property and equipment, at cost	$ 2,799,000	2,764,000
Building and Building Improvements [Member] \| Minimum [Member]
Depreciable lives	7 years
Building and Building Improvements [Member] \| Maximum [Member]
Depreciable lives	30 years
Building and Building Improvements [Member]
Property and equipment, at cost	$ 131,294,000	131,107,000
Machinery and Equipment [Member] \| Minimum [Member]
Depreciable lives	2 years
Machinery and Equipment [Member] \| Maximum [Member]
Depreciable lives	15 years
Machinery and Equipment [Member]
Property and equipment, at cost	$ 185,555,000	181,378,000
Furniture and Fixtures [Member] \| Minimum [Member]
Depreciable lives	3 years
Furniture and Fixtures [Member] \| Maximum [Member]
Depreciable lives	7 years
Furniture and Fixtures [Member]
Property and equipment, at cost	$ 6,582,000	6,550,000
Software and Software Development Costs [Member] \| Minimum [Member]
Depreciable lives	2 years
Software and Software Development Costs [Member] \| Maximum [Member]
Depreciable lives	5 years
Software and Software Development Costs [Member]
Property and equipment, at cost	$ 27,350,000	26,842,000
Vehicles [Member] \| Minimum [Member]
Depreciable lives	2 years
Vehicles [Member] \| Maximum [Member]
Depreciable lives	5 years
Vehicles [Member]
Property and equipment, at cost	$ 1,274,000	1,247,000
Construction in Progress [Member]
Property and equipment, at cost	$ 1,274,000	1,100,000
Minimum [Member]
Depreciable lives	2 years
Maximum [Member]
Depreciable lives	30 years
Property and equipment, at cost	$ 372,129,000	366,989,000
Less accumulated depreciation	(205,591,000)	(189,603,000)
Net property and equipment	$ 166,538,000	$ 177,386,000

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.14)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.13)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.13)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 13
-Subparagraph a
-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 8
-Article 7

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Balance Type:	debit
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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

No definition available.

+ Details

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- Details

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- Details

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- Details

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Data Type:	na
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