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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The components of stock-based compensation for the three month periods ended March 31, 2015 and 2014 were as follows:
|  | Three Months Ended March 31,
|  | 2015 | 2014
Stock options and restricted stock units |  | $ | 272 |  | $ | 424 |
Tax benefit of stock-based compensation expense |  | (103 | ) | (163 | )
After-tax effect of stock-based compensation |  | $ | 169 |  | $ | 261 |
Schedule of Share-based Compensation, Stock Options, Activity | Stock option activity for Fuel Tech’s Incentive Plans for the three months ended March 31, 2015 was as follows:
|  | Number of Options |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding on January 1, 2015 |  | 1,546,500 |  |  | $ | 11.62 |  |  |  |  |
Granted |  | — |  |  | — |  |  |  |  |
Exercised |  | — |  |  | — |  |  |  |  |
Expired or forfeited |  | (5,000 | ) |  | 6.51 |  |  |  |  |
Outstanding on March 31, 2015 |  | 1,541,500 |  |  | $ | 11.63 |  |  | 3.23 |  | $ | — |
Exercisable on March 31, 2015 |  | 1,541,500 |  |  | $ | 11.63 |  |  | 3.23 |  | $ | — |
Schedule of Nonvested Restricted Stock Units Activity | A summary of restricted stock unit activity for the three months ended March 31, 2015 is as follows:
|  | Shares |  | Weighted Average Grant Date Fair Value
Unvested restricted stock units at January 1, 2015 |  | 977,069 |  |  | $ | 5.36 |
Granted |  | 336,000 |  |  | 3.37 |
Forfeited |  | (180,000 | ) |  | 4.67 |
Vested |  | (220,470 | ) |  | 5.06 |
Unvested restricted stock units at March 31, 2015 |  | 912,599 |  |  | $ | 4.84 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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 Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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