Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Based on the results of the model, the weighted-average fair value of the stock options granted during the nine-month period ended September 30, 2013 was $1.79 per option using the following assumptions:         

Expected dividend yield	0.0%
Risk-free interest rate	1.01%
Expected volatility	55.2%
Expected life of option	4.7 years

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The components of stock-based compensation for the three- and nine- month periods ended September 30, 2013 and 2012 were as follows:

	Three Months Ended   September 30,						Nine Months Ended   September 30,
	2013			2012			2013			2012
Stock options and restricted stock units	$	542		$	460		$	1,207		$	800
Deferred directors fees	—			12			—			44
Total stock-based compensation expense	542			472			1,207			844
Tax benefit of stock-based compensation expense	(203		)	(173		)	(450		)	(302		)
After-tax effect of stock-based compensation	$	339		$	299		$	757		$	542

Schedule of Share-based Compensation, Stock Options, Activity

Stock option activity for Fuel Tech’s Incentive Plan for the nine months ended September 30, 2013 was as follows:

	Number of Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding on January 1, 2013	1,914,000		$	11.38
Granted	80,000		3.85
Exercised	(6,250	)	3.80
Expired or forfeited	(67,000	)	6.05
Outstanding on September 30, 2013	1,920,750		$	11.27	3.74	$	163
Exercisable on September 30, 2013	1,910,750		$	11.30	3.72	$	163

Schedule of Nonvested Share Activity

Non-vested stock option activity for the nine months ended September 30, 2013 was as follows:

	Non-Vested Stock Options Outstanding		Weighted-Average Grant Date Fair Value
Outstanding on January 1, 2013	80,500		$	5.35
Granted	80,000		1.79
Vested	(148,000	)	3.53
Forfeited	(2,500	)	5.98
Outstanding on September 30, 2013	10,000		$	3.58

Schedule of Nonvested Restricted Stock Units Activity

A summary of restricted stock unit activity for the nine-month period ended September 30, 2013 is as follows:

	Shares		Weighted Average Grant Date Fair Value
Unvested restricted stock units at January 1, 2013	752,024		$	6.22
Granted	485,000		4.62
Forfeited	(54,654	)	7.24
Vested	(360,563	)	6.70
Unvested restricted stock units at September 30, 2013	821,807		$	4.99