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Stock-Based Compensation (Details) - 2008 LTIP - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Stock-based compensation |  |
Shares authorized to be granted under stock compensation plan | 2,000,000 |
Shares available for future awards | 1,312,015 |
Stock Options |  |
Number Outstanding |  |
Outstanding at beginning of year (in shares) | 540,625 | 90,625
Granted during the year (in shares) |  | 450,000
Forfeited or expired during the year (in shares) | (3,125) |
Outstanding at end of year (in shares) | 537,500 | 540,625
Exercisable at end of year (in shares) | 177,500 | 90,625
Weighted Average Exercise Price |  |
Outstanding at beginning of year (in dollars per share) | $ 2.18 | $ 4.95
Exercise price of options granted (in dollars per share) |  | 1.62
Forfeited or expired during the year (in dollars per share) | 4.80 |
Outstanding at end of year (in dollars per share) | 2.19 | 2.18
Exercisable at end of year (in dollars per share) | $ 3.26 | $ 4.95
Additional disclosures |  |
Stock based compensation expense | $ 39 | $ 32
Unrecognized compensation cost | $ 123 |
Period for recognizing unrecognized compensation cost | 3 years 1 month 24 days |
Stock Options | Senior Executive Officers |  |
Stock-based compensation |  |
Vesting period of stock award |  | 5 years
Contractual term of option awards |  | 10 years
Fair value of stock options |  | $ 194
Stock option per shares (in dollars per share) |  | $ 0.43
Volatility |  | 27.36%
Risk free interest rate |  | 1.21%
Expected option term |  | 5 years
Dividend yield |  | 0.00%
Number Outstanding |  |
Granted during the year (in shares) | 0 | 450,000
Weighted Average Exercise Price |  |
Exercise price of options granted (in dollars per share) |  | $ 1.62

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- Definition Fair value of options granted. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. + References No definition available. + Details
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- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References No definition available. + 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=96867065&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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 (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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 (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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