Share Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Summary of Stock Option Activity

Stock option activity under the Plan as of and for the three years ended December 31, 2020 is as follows:

						Weighted
				Weighted		Average
				Average		Remaining		Aggregate
	Number of			Exercise		Contractual		Intrinsic
	Shares			Price ($)		Term (Years)		Value ($)
Outstanding at December 31, 2017		12,149			2.04
Granted/Issued		2,693			2.72
Exercised		(477	)		1.14				768
Cancelled/Forfeited		(286	)		2.43
Outstanding at December 31, 2018		14,079			2.19		6.8		8,534
Granted/Issued		2,489			3.01
Exercised		(2,572	)		1.76				6,477
Cancelled/Forfeited		(135	)		2.81
Outstanding at December 31, 2019		13,861			2.41		6.7		31,713
Granted/Issued		3,335			2.73
Exercised		(939	)		1.93				1,072
Cancelled/Forfeited		(736	)		2.83
Outstanding at December 31, 2020		15,521			2.49		6.6		23,407
Exercisable at December 31, 2020		10,841			2.35		5.5		17,836

Assumptions Used in Fair Value Measurement of Options Granted

	December 31,
	2020			2019			2018
Risk-free interest rate		0.4	%		1.9	%		2.8	%
Annualized volatility		59.4	%		55.7	%		53.7	%
Weighted average expected life, in years		5.5			5.5			6.0
Expected dividend yield		0.0	%		0.0	%		0.0	%

Schedule of Performance Stock Unit Awards and Restricted Stock Granted Under Long-Term Incentive Program

The performance stock unit awards and restricted stock unit awards granted under the long-term incentive program are summarized in the following table:

	Performance Stock Units					Restricted Stock Units
	Number of Shares			Weighted Average Grant Date Fair Value ($)		Number of Shares			Weighted Average Grant Date Fair Value ($)
Outstanding at December 31, 2017		1,455			2.20		1,157			2.12
Granted		611			2.89		611			2.70
Vested/settled		(173	)		2.18		(500	)		1.99
Forfeited/expired		(51	)		3.01		(42	)		2.68
Outstanding at December 31, 2018		1,842			2.41		1,226			2.44
Granted		593			2.99		789			2.92
Incremental shares earned		59			1.25		—			—
Vested/settled		(415	)		1.18		(614	)		2.19
Forfeited/expired		(238	)		1.12		—			—
Outstanding at December 31, 2019		1,841			3.00		1,401			2.82
Granted		605			2.00		1,078			2.73
Incremental shares earned		77			3.10		—			—
Vested/settled		(388	)		3.11		(785	)		2.80
Forfeited/expired		(494	)		3.02		(127	)		2.83
Outstanding at December 31, 2020		1,641			2.61		1,567			2.77

Summary of Share Based Compensation Allocation Expense

The Company incurred compensation costs in connection with share-based awards in each of the years in the three-year period ended December 31, 2020 as follows:

	December 31,
	2020		2019		2018
Stock options	$	3,709	$	3,436	$	2,956
Restricted stock units		2,239		1,830		1,173
Performance stock units		2,000		1,204		798
Total share-based compensation expense	$	7,948	$	6,470	$	4,927

Performance Stock Units [Member]

Assumptions Used in Fair Value Measurement of Options Granted

The fair values of the TSR PSUs granted were determined using a Monte Carlo simulation and utilized the following inputs and assumptions:

	2020 Award			2019 Award			2018 Award
Closing stock price on grant date	$	2.73		$	2.92		$	2.70
Performance period starting price	$	4.78		$	3.01		$	1.92
Term of award (in years)		2.55			2.55			2.57
Volatility		57.5	%		63.7	%		64.9	%
Risk-free interest rate		0.21	%		1.79	%		2.56	%
Expected dividend yield		0.00	%		0.00	%		0.00	%
Fair value per TSR PSU	$	2.00		$	3.18		$	3.27