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Note 6 - Gain on Sale of Assets and Lease Termination (Details Textual) - USD ($) | 9 Months Ended
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Jun. 27, 2023 | Jun. 28, 2022
Sale Leaseback Transactions, Deferred Gain, Net | $ 76,000 | $ 7,000
Gain (Loss) on Disposition of Other Assets | $ (44,000) |
Gain (Loss) on Contract Termination |  | $ 642,000

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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 Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
Name: | us-gaap_GainLossOnContractTermination
Namespace Prefix: | us-gaap_
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