v2.4.0.6

Stock-Based Compensation (Details) (USD $) |  |  |  |  |  | 12 Months Ended | 96 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2011 2004 Equity Incentive Plan | Jul. 31, 2009 2008 Equity Incentive Plan | Dec. 31, 2008 2008 Equity Incentive Plan | Dec. 31, 2011 RSAs, certain members of Company's management | Dec. 31, 2007 RSAs, certain members of Company's management | Dec. 31, 2011 Employee stock purchase plan M period | Dec. 31, 2011 Employee stock purchase plan | Dec. 31, 2011 Performance-Contingent Restricted Stock Awards Senior management | Dec. 31, 2011 Performance-Contingent Restricted Stock Awards Officer | Dec. 31, 2011 Performance-Contingent Restricted Stock Units Senior management
Information related to stock-based compensation |  |  |  |  |  |  |  |  |  |
Additional number of shares of common stock approved and authorized for issuance |  | 200,000 |  |  |  |  |  |  |  |
Shares remaining available for issuance | 2,090,098 |  |  |  |  | 556,546 | 556,546 |  |  |
Purchase price as a percentage of fair market value of stock |  |  |  |  |  | 85.00% |  |  |  |
Consecutive and overlapping offering periods (in months) |  |  |  |  |  | 24 |  |  |  |
Number of offering periods |  |  |  |  |  | 4 |  |  |  |
Duration of purchase period (in months) |  |  |  |  |  | 6 |  |  |  |
Maximum contributions as a percentage of employee's eligible compensation |  |  |  |  |  | 15.00% |  |  |  |
Common stock, shares issued since plan inception in 2004 |  |  |  |  |  |  | 1,468,454 |  |  |
Shares of common stock approved and authorized for issuance (in shares) |  |  | 500,000 | 1,168,000 | 71,000 | 2,025,000 | 2,025,000 | 1,290,000 | 25,000 | 210,000
Cumulative average sale price per share as of the period end (in dollars per share) |  |  |  |  |  |  | $ 10.15 |  |  |

X
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- Definition Represents the purchase price expressed as a percentage of the fair market value of common stock. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a -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 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of shares issued during the period as a result of an employee stock purchase plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 5 -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. + Details
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