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v3.24.3

Leases - Narrative (Details) | 9 Months Ended
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Sep. 30, 2024 lease
Leases [Abstract] |
Lessee, number of leases | 2
Sublessor, number of leases | 1

X
- Definition Lessee, Operating Leases, Number Of Leases + References No definition available. + Details
Name: | grnd_LesseeOperatingLeasesNumberOfLeases
Namespace Prefix: | grnd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessor, Operating Leases, Number Of Leases + References No definition available. + Details
Name: | grnd_LessorOperatingLeasesNumberOfLeases
Namespace Prefix: | grnd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration