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Note 6 - Gain on Sale of Assets (Details Textual) - USD ($) | 3 Months Ended
--- | ---
Dec. 26, 2023 | Dec. 27, 2022
Sale Leaseback Transactions, Deferred Gain, Net | $ 10,000 | $ 8,000
Gain (Loss) on Disposition of Other Assets |  | $ (8,000)

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- Definition Amount of net deferred gain on sale leaseback transactions. + References No definition available. + Details
Name: | gtim_SaleLeasebackTransactionsDeferredGainNet
Namespace Prefix: | gtim_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of gain (loss) on sale or disposal of other assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
Name: | us-gaap_GainLossOnSaleOfOtherAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration