XML 216 R63.htm IDEA: XBRL DOCUMENT
v3.25.4

Related Party Loans (Details) - USD ($) |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2025 | Sep. 30, 2022 | Sep. 20, 2021 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Mar. 11, 2024 | Jul. 01, 2022 | Mar. 10, 2022
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of expense paid in advance |  |  |  |  | $ 110,623 |  |  |  |  |  |  |  |  |  |  |  |
Initial term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |
Rental amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 745 |
Loans interest rate |  | 15.00% |  |  |  | 15.00% |  |  | 15.00% |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  | $ 6,361 |  | $ 5,780 | $ 18,766 |  | $ 17,424 | $ 23,657 |  | $ 35,482 |  |  |
Issued ordinary shares | [1] | 2,467,337 |  |  |  | 2,467,337 |  |  | 2,467,337 |  |  | 2,445,647 |  |  |  |  |
Ordinary shares per share | [1] | $ 0.006 |  |  |  | $ 0.006 |  |  | $ 0.006 |  |  | $ 0.006 |  |  |  |  |
Outstanding balance |  | $ 14,804 | [1] |  |  | $ 14,804 | [1] |  | $ 14,804 | [1] |  | $ 14,674 | [1] | 13,775 |  |  |
Compensation payable |  | 5.8 |  |  |  | 5.8 |  |  | 5.8 |  |  |  |  |  |  |  |
Outstanding compensation payable |  |  |  |  |  |  |  |  |  |  |  | $ 1,541,025 |  |  |  |  |
Imputed interest rate |  |  |  |  |  |  |  |  | 12.00% |  |  | 12.00% |  |  |  |  |
Interest expense for amortization |  |  |  |  |  |  |  |  |  |  | $ 345,060 | $ 350,084 |  | 592,191 |  |  |
outstanding balance on the payable |  |  |  |  |  |  |  |  |  |  |  | 737,894 |  | 5,338,273 |  |  |
Loans drawdown |  | $ 152,308 |  |  |  |  |  |  | $ 498,516 |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  | 3,956 |  |  |  |  |  |  |  |  |  |  |
Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable |  |  |  |  |  |  |  |  |  |  |  | $ 2,159,866 |  | $ 2,231,781 |  |  |
Mr.Liu Yu {Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repaid amount |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  | $ 1,008 |  |  | $ 6,413 |  |  |  |  |  |  |  |
Mr. Lim Hooi Beng [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Owned percentage |  |  |  |  |  |  |  |  |  |  |  | 13.80% |  | 14.50% |  |  |
Issued ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,917 |  |
Ordinary shares per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4 |  |
Outstanding balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,100,000 |  |
Fair value of ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.7 |  |
Mr. Lim Hooi Beng [Member] | ZhongHe Industries Sdn Bhd (ZHI) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Owned percentage |  |  |  |  |  |  |  |  |  |  |  | 20.00% |  | 20.00% |  |  |
Mr. Aw Jeen Rong [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Owned percentage |  |  |  |  |  |  |  |  |  |  |  | 6.00% |  |  |  |  |
Loans interest rate |  |  |  |  |  |  |  |  |  |  |  | 8.00% |  |  |  |  |
Loans Payable |  |  |  |  |  |  |  |  |  |  |  | $ 252,304 |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  | $ 1,901 |  |  |  |  |
Mr.Liu Yu {Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Owned percentage |  |  |  |  |  |  |  |  |  |  |  | 24.30% |  | 25.50% |  |  | 24.30%
Loans interest rate |  |  |  |  |  |  |  |  |  |  |  | 8.00% |  |  |  |  |
Loans Payable |  |  |  |  |  |  |  |  |  |  |  | $ 103,469 |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  | 362 |  |  |  |  |
Issued ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,275,000 |  |
Ordinary shares per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4 |  |
Outstanding balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,100,000 |  |
Fair value of ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.7 |  |
Outstanding balance on the payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,300,000
Compensation payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,300,000
Outstanding compensation payable |  |  |  |  |  |  |  |  |  |  |  | $ 5,800,000 |  |  |  |  |
Mr. Lee Ping Wei [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Owned percentage |  | 48.50% |  |  |  | 48.50% |  |  | 48.50% |  |  | 6.10% |  |  |  |  |
Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued ordinary shares |  |  |  |  |  |  |  |  |  |  |  | 2,445,647 |  |  |  |  |
Compensation payable |  |  |  |  |  |  |  |  |  |  |  | $ 6,300,000 |  |  |  |  |
Previously Reported [Member] | Mr. Lim Hooi Beng [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 775,000 |  |
Ordinary Shares [Member] | Mr.Liu Yu {Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued ordinary shares |  |  |  | 21,250 |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares per share |  |  |  | $ 4 |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  | $ 5,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of ordinary shares |  |  |  | $ 2.7 |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares [Member] | Mr. Lim Hooi Beng [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Owned percentage |  |  |  |  |  |  |  |  |  |  |  | 13.80% |  | 14.50% |  |  |
Ordinary Shares [Member] | Mr. Aw Jeen Rong [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Owned percentage |  |  |  |  |  |  |  |  |  |  |  | 6.00% |  | 6.30% |  |  |
[1] | Giving retroactive effect to reverse recapitalization effected on March 14, 2024 to reflect exchange ratio of approximately 55.1 as described in Note 4 and share combination at a ratio of one-for-sixty effected on August 25, 2025 as described in Note 1.

X
- Definition Fair value of ordinary shares. + References No definition available. + Details
Name: | gti_FairValueOfOrdinaryShares
Namespace Prefix: | gti_
Data Type: | dtr:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Imputed interest rate. + References No definition available. + Details
Name: | gti_ImputedInterestRate
Namespace Prefix: | gti_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The tenancy is subject to an initial term + References No definition available. + Details
Name: | gti_InitialTerm
Namespace Prefix: | gti_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of loans drawdown. + References No definition available. + Details
Name: | gti_LoansDrawdown
Namespace Prefix: | gti_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_CommonStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479887/480-10-S45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (01)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480244/480-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481372/852-10-55-10 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(22)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_CommonStockValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable within one year (or the operating cycle, if longer). Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 25 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483070/710-10-25-9 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483043/710-10-30-2 + Details
Name: | us-gaap_DeferredCompensationLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable within one year (or the operating cycle, if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_DeferredCompensationShareBasedArrangementsLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of interest expense classified as operating and nonoperating. Includes, but is not limited to, cost of borrowing accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 49 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-49 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-24 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483013/835-20-50-1 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479105/946-220-45-3 + Details
Name: | us-gaap_InterestExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69F Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479105/946-220-45-3 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-6 + Details
Name: | us-gaap_InterestExpenseDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest expense classified as other. + References No definition available. + Details
Name: | us-gaap_InterestExpenseOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_LoansPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LongTermNotesPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_OtherLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term notes payable classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_OtherNotesPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow from advancing money to an affiliate (an entity that is related but not strictly controlled by the entity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-13 + Details
Name: | us-gaap_PaymentsForAdvanceToAffiliate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-13 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount of income producing properties held for rental. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_RentalProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_RepaymentsOfRelatedPartyDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date which accrues interest at a set, unchanging rate. + References No definition available. + Details
Name: | us-gaap_ShortTermDebtPercentageBearingFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=gti_MrLiuYuMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=gti_MrLimHooiBengMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=gti_ZhongHeIndustriesSdnBhdZHIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=gti_MrAwJeenRongMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=gti_MrLiuYuMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=gti_LeePingWeiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RestatementAxis=srt_ScenarioPreviouslyReportedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |