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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurement, Cash Equivalent

As of March 31, 2013 and December 31, 2012, cash equivalents consisted of the following:

	March 31, 2013
	Gross	Gross	Gross	Estimated
	Amortized	Unrealized	Unrealized	Fair
	Cost	Gains	(Losses)	Value
Commercial paper	$ 2,817	$ -	$ -	$ 2,817
Total included in cash and cash equivalents	$ 2,817	$ -	$ -	$ 2,817
	December 31, 2012
	Gross	Gross	Gross	Estimated
	Amortized	Unrealized	Unrealized	Fair
	Cost	Gains	(Losses)	Value
Commercial paper	$ 2,009	$ -	$ -	$ 2,009
Total included in cash and cash equivalents	$ 2,009	$ -	$ -	$ 2,009

X

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19279-110258



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration