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Stock-based Compensation - Options Outstanding and Exercisable (Details) - 2008 LTIP - Stock Options - $ / shares | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Outstanding |  |  |
Number Outstanding | 537,500 | 537,500 | 540,625
Weighted Average Remaining Contractual Life | 6 years 7 days |  |
Weighted Average Exercise Price | $ 2.19 | $ 2.19 | $ 2.18
Exercisable |  |  |
Number Outstanding | 267,500 | 177,500 |
Weighted Average Exercise Price | $ 2.71 | $ 3.26 |
Grant Date January 21, 2009 |  |  |
Outstanding |  |  |
Number Outstanding | 7,500 |  |
Weighted Average Remaining Contractual Life | 18 days |  |
Weighted Average Exercise Price | $ 4.00 |  |
Exercisable |  |  |
Number Outstanding | 7,500 |  |
Weighted Average Exercise Price | $ 4.00 |  |
Grant Date March 18, 2009 |  |  |
Outstanding |  |  |
Number Outstanding | 75,000 |  |
Weighted Average Remaining Contractual Life | 2 months 16 days |  |
Weighted Average Exercise Price | $ 4.98 |  |
Exercisable |  |  |
Number Outstanding | 75,000 |  |
Weighted Average Exercise Price | $ 4.98 |  |
Grant Date January 21, 2010 |  |  |
Outstanding |  |  |
Number Outstanding | 5,000 |  |
Weighted Average Remaining Contractual Life | 1 year 18 days |  |
Weighted Average Exercise Price | $ 6.00 |  |
Exercisable |  |  |
Number Outstanding | 5,000 |  |
Weighted Average Exercise Price | $ 6.00 |  |
Grant Date February 24, 2016 |  |  |
Outstanding |  |  |
Number Outstanding | 450,000 |  |
Weighted Average Remaining Contractual Life | 7 years 1 month 24 days |  |
Weighted Average Exercise Price | $ 1.62 |  |
Exercisable |  |  |
Number Outstanding | 180,000 |  |
Weighted Average Exercise Price | $ 1.62 |  |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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