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Stock Option Plans and Share-Based Compensation - ESPP- Employee stock purchase plan (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2014
Employee Stock [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
ESPP max percent of earnings contributable |  | 15.00%
ESPP purchase price as percent of begin and-or ending fair value |  | 85.00%
Capital shares reserved for future issuance | 619,616 | 619,616
Shares issued in period | 227,275 | 481,284
Employee Stock Purchase Plan [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of additional shares authorized |  | 2,622,426
Compensation not yet recognized | $ 2.6 | $ 2.6
Compensation cost not yet recognized, period for recognition |  | 1 year

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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 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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