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Related Party Transactions (Details) (Sierra Partners LLC [Member], USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Sierra Partners LLC [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Monthly retainer fee |  | $ 10 |  |
Stock options issued (in shares) |  |  |  | 90,000
Expenses from transactions with related party |  |  | 94 |
Total payments to related party | 390 | 390 |  |
Payments to related party | $ 30 | $ 60 |  |

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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 57 -Paragraph 2 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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