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Note 6. Short-Term Investments (Details) - Short-term Investments (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Note 6. Short-Term Investments (Details) - Short-term Investments [Line Items]
Amortized Cost	$ 49,099
Fiar Value	49,099
Unrealized Gain/(Loss)	0
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Note 6. Short-Term Investments (Details) - Short-term Investments [Line Items]
Amortized Cost	21,986
Fiar Value	21,993
Unrealized Gain/(Loss)	7
Corporate Debt Securities [Member]
Note 6. Short-Term Investments (Details) - Short-term Investments [Line Items]
Amortized Cost	27,113
Fiar Value	27,106
Unrealized Gain/(Loss)	$ (7)

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558



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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

-Paragraph 5

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ 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 210.5-02.2)

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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