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SHAREHOLDERS' EQUITY - Deferred Compensation Arrangement (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2013 Employees and Non Employee Members of Scientific Advisory Board [Member] | Mar. 31, 2012 Employees and Non Employee Members of Scientific Advisory Board [Member] | Dec. 31, 2013 Employees [Member] | Dec. 31, 2012 Employees [Member] | Dec. 31, 2013 Non Employee Members of Scientific Advisory Board [Member] | Dec. 31, 2012 Non Employee Members of Scientific Advisory Board [Member]
Deferred Compensation Arrangement with Employees and Non-Employees, Share-Based Payments [Line Items] |  |  |  |  |  |  |  |
Shares issued (in shares) |  |  | 31,301 | 22,568 |  |  |  |
Fair value of shares issued |  |  |  |  | $ 1,046 | $ 435 | $ 300 | $ 300
Shares withheld for tax withholding obligations (in shares) |  |  |  |  | 8,071 | 4,672 |  |
Fair value of shares withheld for tax withholding obligations | $ 2,700 | $ 2,800 |  |  | $ 271 | $ 154 |  |

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- Details
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- Definition The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References No definition available. + Details
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- Definition The total fair value of shares issued during the period under a deferred compensation arrangement. + 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of shares issued pursuant to the terms of a deferred compensation arrangement. + 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 (l) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer. + References No definition available. + Details
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