XML 66 R34.htm IDEA: XBRL DOCUMENT v3.25.0.1

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2024

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 and 2022 were as follows:

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

Stock Options, Activity

The following table summarizes activity related to stock options during 2024:

						Number of Options						Weighted- Average Exercise Price Per Share						Aggregate Intrinsic Value (thousands)						Weighted Average Remaining Term (Years)
Outstanding at December 31, 2023						2,027,611						$	11.27
Granted						—						—
Exercised						—						—
Forfeited or expired						(34,939)						6.94
Outstanding at December 31, 2024						1,992,672						$	11.34					$	—					5.5 years
Vested and Expected to vest as of December 31, 2024						1,992,672						$	11.34					$	—					5.5 years
Exercisable at December 31, 2024						1,611,366						$	12.25					$	—					5.0 years

A summary of the status and changes of unvested 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, 2023						582,994						$	4.04
Granted						—						—
Vested						(174,225)						3.87
Forfeited						(27,463)						4.01
Outstanding unvested as of December 31, 2024						381,306						$	4.12

Schedule of Nonvested Restricted Stock Units Activity

A summary of the status and changes of unvested but outstanding 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, 2023						885,365						$	7.18
Granted						3,299,462						1.80
Cancelled						(322,093)						3.36
Vested						(263,661)						6.92
Outstanding unvested as of December 31, 2024						3,599,073						$	2.61

Share-Based Payment Arrangement, Restricted Stock Unit, Activity

The following table summarizes RSU and DRSU activity during 2024 for our non-employee directors:

						Number of Shares						Weighted- Average Grant Date Fair Value
Outstanding as of December 31, 2023						130,923						$	4.25
Granted						395,480						1.72
Vested and delivered						(136,965)						2.15
Outstanding vested and deferred as of December 31, 2024						389,438						$	2.42

Schedule of Nonvested Performance-Based Units Activity

The following table summarizes the activity related to PSUs during 2024:

						Number of Shares						Weighted- Average Grant Date Fair Value
Outstanding as of December 31, 2023						348,015						$	7.23
Granted						1,477,084						1.06
Vested						—						—
Forfeited						(67,268)						3.88
Outstanding as of December 31, 2024						1,757,831						$	2.17

Schedule of Deferred Share Units

The following table summarizes DSU activity during 2024:

						Number of Shares						Weighted- Average Grant Date Fair Value
Outstanding as of December 31, 2023						377,540						$	6.52
Granted						262,906						1.30
Distributed						(109,334)						6.44
Outstanding vested and deferred as of December 31, 2024						531,112						$	3.95

X

- Definition

Schedule of Deferred Share Units

+ References

No definition available.

+ Details

Name:	gti_ScheduleOfDeferredShareUnitsTableTextBlock
Namespace Prefix:	gti_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the changes in outstanding nonvested performance-based units.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the changes in outstanding nonvested restricted stock units.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Subparagraph (f)(2)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration