Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Stock Options, Valuation Assumptions

The weighted average assumptions used in our Black-Scholes option pricing model for options granted in 2023, 2022 and 2021 were as follows:

	2023		2022		2021
Dividend yield	0.71% - 0.83%		0.40% - 0.56%		0.32% - 0.35%
Expected volatility	58.16	%	58.14	%	61.62	%
Risk-free interest rate	3.60% - 4.10%		1.93% - 2.89%		1.1% - 1.21%
Expected term in years	6.0 years		6.5 years		6.5 years

Stock Options, Activity

The following table summarizes activity related to stock options during 2023:

	Number of Options	Weighted- Average Exercise Price Per Share		Aggregate Intrinsic Value (thousands)		Weighted Average Remaining Term (Years)
Outstanding at December 31, 2022	1,890,167	$	12.30
Granted	519,482	5.51
Exercised	—	—
Forfeited or expired	(382,038)	8.56
Outstanding at December 31, 2023	2,027,611	$	11.27	$	—	6.5 years
Vested and Expected to vest as of December 31, 2023	2,027,611	$	11.27	$	—	6.5 years
Exercisable at December 31, 2023	1,444,617	$	12.84	$	—	5.7 years

A summary of the status and changes of stock options and the related average price per share follows:

	Number of Options	Weighted- Average Grant Date Fair Value
Outstanding unvested as of December 31, 2022	429,503	$	5.42
Granted	519,482	3.01
Vested	(122,221)	5.73
Forfeited	(243,770)	3.42
Outstanding unvested as of December 31, 2023	582,994	$	4.04

Schedule of Nonvested Restricted Stock Units Activity

A summary of the status and changes of shares subject to RSU awards for employees and the related average price per share follows:

	Number of Shares	Weighted- Average Grant Date Fair Value
Outstanding unvested as of December 31, 2022	477,317	$	9.72
Granted	669,593	5.58
Cancelled	(164,956)	6.54
Vested	(96,589)	9.76
Outstanding unvested as of December 31, 2023	885,365	$	7.18

Share-Based Payment Arrangement, Restricted Stock Unit, Activity

The following table summarizes RSU and DRSU activity during 2023 for our non-employee directors:

	Number of Shares	Weighted- Average Grant Date Fair Value
Outstanding as of December 31, 2022	—	$	—
Granted	154,894	4.24
Vested and delivered	(23,971)	4.18
Outstanding vested and deferred as of December 31, 2023	130,923	$	4.25

Schedule of Nonvested Performance-Based Units Activity

The following table summarizes the activity related to PSUs during 2023:

	Number of Shares	Weighted- Average Grant Date Fair Value
Outstanding as of December 31, 2022	—	$	—
Granted	544,801	7.30
Vested	—	—
Forfeited	(196,786)	7.43
Outstanding as of December 31, 2023	348,015	$	7.23

Schedule of Deferred Share Units

The following table summarizes DSU activity during 2023:

	Number of Shares	Weighted- Average Grant Date Fair Value
Outstanding as of December 31, 2022	362,640	$	8.80
Granted	152,509	3.59
Distributed	(137,609)	9.34
Outstanding vested and deferred as of December 31, 2023	377,540	$	6.52