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Share Based Award Stock Option Plans (Details) - shares | 12 Months Ended |
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Dec. 31, 2019 | Dec. 31, 2011
2011 Plan [Member] |  |
Stock Incentive Plans [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 3,925,000 | 650,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized | 3,275,000 |
Shares transferred from superseded plan | 263,300 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 4,188,300 |
2003 Plan [Member] |  |
Stock Incentive Plans [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 248,700 |
2001 Director's Plan [Member] |  |
Stock Incentive Plans [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 750,000 |
Share-based Payment Arrangement, Option [Member] | 2014 Inducement Plan [Member] |  |
Stock Incentive Plans [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 182,366 |
Restricted Stock Units (RSUs) [Member] | 2014 Inducement Plan [Member] |  |
Stock Incentive Plans [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 68,039 |

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- Definition [Line Items] for Stock Incentive Plans [Table] + References No definition available. + Details
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- Definition Number of additional shares authorized for issuance under share-based payment arrangement. + References No definition available. + Details
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- Definition Number of shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=116856206&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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