Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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 month periods ended March 31, 2016 and 2015 were as follows:

	Three Months Ended   March 31,
	2016		2015
Stock options and restricted stock units	$	461	$	272
Tax benefit of stock-based compensation expense	—		(103		)
After-tax effect of stock-based compensation	$	461	$	169

Schedule of Share-based Compensation, Stock Options, Activity

Stock option activity for Fuel Tech’s Incentive Plans for the three months ended March 31, 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	—		—
Exercised	—		—
Expired or forfeited	(26,000	)	10.75
Outstanding on March 31, 2016	1,165,125		$	10.47	4.11	$	—
Exercisable on March 31, 2016	1,165,125		$	10.47	4.11	$	—

Schedule of Nonvested Restricted Stock Units Activity

A summary of restricted stock unit activity for the three months ended March 31, 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		1.84
Forfeited	(132,499	)	5.11
Vested	(120,334	)	4.67
Unvested restricted stock units at March 31, 2016	1,797,912		$	3.00