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Stock Option Plans and Share-Based Compensation ESPP- Employee stock purchase plan (Details) (USD $) | 3 Months Ended
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Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Common Stock, Capital Shares Reserved for Future Issuance | 2,457,760
Employee Stock [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
ESPP max percent of earnings contributable | 15.00%
ESPP max annual contribution | $ 25,000
ESPP purchase price as percent of begin and-or ending fair value | 85.00%
Shares, Issued | 4,484,664
Common Stock, Capital Shares Reserved for Future Issuance | 846,891
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period | 254,009
Employee Stock Purchase Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized | 2,622,426.000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options | $ 1,439,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 2 years 0 months

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- Definition ESPP max percent of earnings contributable - maxium percentage of employee earnings which may be contributed to the ESPP (also subject to dollar max) + References No definition available. + Details
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- Definition ESPP purchase price as percent of begin and-or ending fair value - employees get the benefit of discount from close price, with more favorable of begin or end of enrollment period + References No definition available. + Details
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- Definition ESPP max annual contribution = maxiumum annual contribution permitted from each employee's earnings towards the ESPP + References No definition available. + Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested options awarded to employees as compensation. + References No definition available. + Details
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- Details
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + References No definition available. + Details
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- Definition Number of share instruments newly issued under a share-based compensation plan. + 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 of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. + References Reference 1: 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 + Details
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