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Note 9 - Equity Method Investment (Details) - TEL’s Summarized Financial Information - Income Statement (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Income Statements, Captions [Line Items]
Operating Income	$ 5,882	$ 4,645	$ 11,517	$ 18,060
TEL [Member]
Condensed Income Statements, Captions [Line Items]
Revenue	16,672	11,219	39,838	42,242
Operating Expenses	14,256	10,094	34,631	39,168
Operating Income	2,416	1,125	5,207	3,074
Net Income	$ 2,009	$ 895	$ 4,217	$ 2,422

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- Definition

The amount of the cost of sales reported by an equity method investment of the entity.

+ References

No definition available.

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- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(g))

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

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-Section 50

-Paragraph 3

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-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571



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-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33912-111571



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph bb

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Name Regulation S-X (SX)

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The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

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The net result for the period of deducting operating expenses from operating revenues.

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