Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2014

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 and nine- month periods ended September 30, 2014 and 2013 were as follows:

	Three Months Ended   September 30,						Nine Months Ended   September 30,
	2014			2013			2014			2013
Stock options and restricted stock units	$	469		$	542		$	1,694		$	1,207
Tax benefit of stock-based compensation expense	(180		)	(203		)	(652		)	(450		)
After-tax effect of stock-based compensation	$	289		$	339		$	1,042		$	757

Schedule of Valuation Assumptions

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, 2014 was $2.20 per option using the following assumptions:         

Expected dividend yield	0.0%
Risk-free interest rate	1.55%
Expected volatility	47.4%
Expected life of option	4.9 years

Schedule of Share-based Compensation, Stock Options, Activity

Stock option activity for Fuel Tech’s Incentive Plans for the nine- months ended September 30, 2014 was as follows:

	Number of Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding on January 1, 2014	1,688,500		$	11.88
Granted	94,500		5.22
Exercised	(60,000	)	4.96
Expired or forfeited	(5,000	)	22.63
Outstanding on September 30, 2014	1,718,000		$	11.73	3.46	$	71
Exercisable on September 30, 2014	1,718,000		$	11.73	3.46	$	71

Schedule of Nonvested Share Activity

Non-vested stock option activity for the nine months ended September 30, 2014 was as follows:

	Non-Vested Stock Options Outstanding		Weighted-Average Grant Date Fair Value
Outstanding on January 1, 2014	10,000		$	3.58
Granted	94,500		2.20
Vested	(104,500	)	2.33
Forfeited	—		—
Outstanding on September 30, 2014	—		$	—

Schedule of Nonvested Restricted Stock Units Activity

A summary of restricted stock unit activity for the nine-month period ended September 30, 2014 is as follows:

	Shares		Weighted Average Grant Date Fair Value
Unvested restricted stock units at January 1, 2014	772,016		$	5.35
Granted	484,450		5.43
Forfeited	(14,515	)	5.16
Vested	(230,507	)	5.68
Unvested restricted stock units at September 30, 2014	1,011,444		$	5.31