Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2016

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, 2016 and 2015 were as follows:

	Three Months Ended   September 30,					Nine Months Ended   September 30,
	2016		2015			2016		2015
Stock options and restricted stock units	$	479	$	487		$	1,520	$	1,320
Tax benefit of stock-based compensation expense	—		(188		)	—		(508		)
After-tax effect of stock-based compensation	$	479	$	299		$	1,520	$	812

Schedule of Share-based Compensation, Stock Options, Activity

Stock option activity for Fuel Tech’s Incentive Plans for the nine months ended September 30, 2016 was as follows:

	Number of Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding on January 1, 2016	1,191,125		$	10.48
Granted	81,000		1.58
Exercised	—		—
Expired or forfeited	(200,375	)	16.39
Outstanding on September 30, 2016	1,071,750		$	8.70	4.69	$	—
Exercisable on September 30, 2016	1,071,750		$	8.70	4.69	$	—

Schedule of Nonvested Restricted Stock Units Activity

A summary of restricted stock unit activity for the nine months ended September 30, 2016 is as follows:

	Shares		Weighted Average Grant Date Fair Value
Unvested restricted stock units at January 1, 2016	1,204,883		$	4.21
Granted	845,862		1.88
Forfeited	(172,949	)	4.58
Vested	(381,916	)	4.36
Unvested restricted stock units at September 30, 2016	1,495,880		$	2.81