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Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Presentation of fair value of financial assets using the inputs
Total financial assets	$ 223	$ 733
Money market funds
Presentation of fair value of financial assets using the inputs
Total financial assets	223	733
Quoted Prices in Active Markets for Identical Assets (Level 1)
Presentation of fair value of financial assets using the inputs
Total financial assets	223	733
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds
Presentation of fair value of financial assets using the inputs
Total financial assets	223	733
Significant Other Observable Inputs (Level 2)
Presentation of fair value of financial assets using the inputs
Total financial assets
Significant Other Observable Inputs (Level 2) | Money market funds
Presentation of fair value of financial assets using the inputs
Total financial assets
Significant Unobservable Inputs (Level 3)
Presentation of fair value of financial assets using the inputs
Total financial assets
Significant Unobservable Inputs (Level 3) | Money market funds
Presentation of fair value of financial assets using the inputs
Total financial assets

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ 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 (a)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

+ Details

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

X

- Details

Name:	us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration