Significant Stock-Based Plan Activity and Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Information Regarding Stock-Based Compensation Expense

Stock-Based Compensation

Certain information regarding our stock-based compensation was as follows (in thousands, except per share amounts):

	Year Ended December 31,
	2018		2017		2016
Weighted average per share fair value of stock options granted	$	—	$	—	$	4.06
Intrinsic value of stock options exercised	388		265		223
Intrinsic value of fully-vested stock awards granted	992		1,812		944

Stock-Based Compensation Expense

Stock-based compensation expense was recognized in our Consolidated Statements of Operations as follows (in thousands):

	Year Ended December 31,
	2018		2017		2016
Selling, general and administrative expense	$	1,334	$	1,197	$	1,005
Cost of sales	150		119		82
Total stock-based compensation expense	$	1,484	$	1,316	$	1,087

Weighted Average Assumptions Utilized in Determining Fair Value

The following weighted average assumptions were utilized in determining fair value pursuant to the Black-Scholes option pricing model:

	Year Ended December 31,
	2018		2017		2016
Risk-free interest rate	—	%	—	%	1.66	%
Dividend yield	—	%	—	%	—	%
Expected life	—		—		6.81 years
Volatility	—	%	—	%	51.70	%

Stock Option Activity

Stock Option Activity

Stock option activity for the year ended December 31, 2018 was as follows:

	Options Outstanding		Weighted Average Exercise Price
Outstanding at December 31, 2017	359,713		$	9.88
Granted	—		—
Exercised	(43,734	)	10.29
Canceled	(9,489	)	10.18
Outstanding at December 31, 2018	306,490		9.82

Information Regarding Options Outstanding

Certain information regarding options outstanding as of December 31, 2018 was as follows:

	Options Outstanding		Options Exercisable
Number	306,490		224,714
Weighted average exercise price	$	9.82	$	9.92
Aggregate intrinsic value	$	1,384,000	$	992,000
Weighted average remaining contractual term	5.7 years		5.4 years

Performance-based Stock Award Activity

Cumulative activity related to performance-based awards during the year ended December 31, 2018 was as follows (in shares):

	Awards Expected to Vest		Weighted Average Grant Date Fair Value Per Share
Awards expected to vest as of January 1, 2018	183,721		$	10.41
Granted (target amount)	41,080		18.25
Canceled due to termination of employee	(52,628	)	11.51
Not expected to vest due to failure to meet performance goals	(92,805	)	7.69
Awards expected to vest as of December 31, 2018	79,368		16.85