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Retirement Plan (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Retirement Plan |  |  |
Maximum employee compensation to be deferred per year | $ 16,500 | $ 16,500 | $ 16,500
Maximum employer matching contribution as a percentage of annual compensation | 3.00% | 3.00% | 3.00%
Maximum employer matching contribution for each employee | 200,000 | 200,000 | 200,000
Company's total contribution under 401 (k) plan | $ 131,000 | $ 125,000 | $ 115,000

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- Definition Represents the maximum employer matching contribution as a percentage of employee's salary. + References No definition available. + Details
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- Definition Represents the maximum employee compensation to be deferred per annum. + References No definition available. + Details
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- Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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