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Leases - Schedule of Sublease Income Payments Under Operating Leases (Details) | Dec. 31, 2025 USD ($)
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Schedule of Sublease Income Payments Under Operating Leases [Abstract] |
FY2026 | $ 425,218
FY2027 | 400,461
FY2028 | 408,471
FY2029 | 69,209
Total sublease receivable | 1,303,359
Less: imputed interest | 147,481
Present value of sublease income | $ 1,155,878

X
- Definition Amount of lessee's undiscounted obligation for subleaselease income for operating lease. + References No definition available. + Details
Name: | gdc_LesseeOperatingLeaseLiabilitySubleaseIncomeDue
Namespace Prefix: | gdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for Sublease income for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | gdc_LesseeOperatingLeaseLiabilitySubleaseIncomeDueNextTwelveMonths
Namespace Prefix: | gdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for sublease income for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | gdc_LesseeOperatingLeaseLiabilitySubleaseIncomeDueYearFive
Namespace Prefix: | gdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for sublease income for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | gdc_LesseeOperatingLeaseLiabilitySubleaseIncomeDueYearThree
Namespace Prefix: | gdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for sublease income for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | gdc_LesseeOperatingLeaseLiabilitySubleaseIncomeDueYearTwo
Namespace Prefix: | gdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for sublease income in excess of discounted obligation for sublease income for operating lease. + References No definition available. + Details
Name: | gdc_LesseeOperatingLeaseLiabilitySubleaseIncomeUndiscountedExcessAmount
Namespace Prefix: | gdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for sublease income from operating lease. + References No definition available. + Details
Name: | gdc_OperatingLeaseLiabilitySubleaseIncome
Namespace Prefix: | gdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | gdc_ScheduleOfSubleaseIncomePaymentsUnderOperatingLeasesAbstract
Namespace Prefix: | gdc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration