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Stockholders' Equity Rights plan (Details) (USD $) | 12 Months Ended
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Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Preferred Stock, Shares Authorized | 15,000,000
Rights [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Investment Options, Exercise Price | $ 100.00
Rights [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 0.01

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- Definition The exercise price of each class of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 4 -Section 08 -Paragraph i -Subparagraph 4 Reference 2: 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.(i)(4)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 + Details
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