Stock-Based Compensation (Tables)

3 Months Ended

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