Leases (Details) - Schedule of supplemental cash flow disclosures - USD ($) $ in Thousands	3 Months Ended
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

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

No definition available.

Name:	gtim_RightOfUseAssetObtainedInExchangeForOperatingLeasesLiability
Namespace Prefix:	gtim_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration