Stock-Based Compensation (Tables)

6 Months Ended

Jun. 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 six-month period ended June 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 six- month periods ended June 30, 2013 and 2012 were as follows:

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2013			2012			2013			2012
Stock options and restricted stock units	$	336		$	147		$	665		$	341
Deferred directors fees	—			15			—			31
Total stock-based compensation expense	336			162			665			372
Tax benefit of stock-based compensation expense	(122		)	(57		)	(242		)	(129		)
After-tax effect of stock-based compensation	$	214		$	105		$	423		$	243

Schedule of Share-based Compensation, Stock Options, Activity

Stock option activity for Fuel Tech’s Incentive Plan for the six months ended June 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	—		—
Expired or forfeited	(67,000	)	6.05
Outstanding on June 30, 2013	1,927,000		$	11.25	4.0 years	$	17
Exercisable on June 30, 2013	1,897,000		$	11.31	4.0 years	$	17

Schedule of Nonvested Share Activity

Non-vested stock option activity for the six months ended June 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	(128,000	)	3.34
Forfeited	(2,500	)	5.98
Outstanding on June 30, 2013	30,000		$	4.36

Schedule of Nonvested Restricted Stock Units Activity

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

	Shares		Weighted Average Grant Date Fair Value
Unvested restricted stock units at December 31, 2012	752,024		$	6.22
Granted	476,000		4.77
Forfeited	(45,654	)	7.57
Vested	(360,563	)	5.36
Unvested restricted stock units at June 30, 2013	821,807		$	5.68