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Leases (Details) - Schedule of supplemental cash flow disclosures - USD ($) $ in Thousands | 3 Months Ended
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Dec. 27, 2022 | Dec. 28, 2021
Schedule Of Supplemental Cash Flow Disclosures [Abstract] |  |
Cash paid for operating lease liabilities | $ 1,853 | $ 1,718
Non-cash operating lease assets obtained in exchange for operating lease liabilities | $ (73) | $ 60

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

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- Definition Amount of cash outflow for operating lease liabilities. + References No definition available. + Details
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Namespace Prefix: | gtim_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References No definition available. + Details
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Namespace Prefix: | gtim_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration