Fair Value Measurements (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Fair Value Measurements [Abstract]
FairValueAssetsLevel1ToLevel2TransfersAmount	$ 0	$ 0
FairValueAssetsLevel2ToLevel1TransfersAmount	0	0
FairValueLiabilitiesLevel1ToLevel2TransfersAmount	0	0
FairValueLiabilitiesLevel2ToLevel1TransfersAmount	$ 0	$ 0

Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bb)

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

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- Definition

Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

+ References

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- Definition

Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

+ References

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- Definition

Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

+ References

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