BUSINESS SEGMENTS - Schedule of Business Segments (Details) - Operating Segments [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 29, 2025	Mar. 30, 2024	Mar. 29, 2025	Mar. 30, 2024	Sep. 28, 2024
REVENUES:
TOTAL REVENUE	$ 52,831	$ 47,236	$ 102,354	$ 91,656
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD	22,034	19,702	44,544	39,413
GROSS PROFIT:	30,797	27,534	57,810	52,243
ADDITIONAL REVENUES:
TOTAL ADDITIONAL REVENUES:	801	833	1,540	1,553
Capital Expenditures:
Consolidated Totals	986	2,936	1,731	4,314
Identifiable Assets:
Total identifiable assets	143,307		143,307		$ 142,082
ADDITIONAL EXPENSES:
Payroll and related costs	16,184	14,972	31,930	29,357
Operating expenses	7,057	6,383	13,611	12,297
Occupancy costs	2,103	1,930	4,057	4,094
Selling, general and administrative expenses	1,458	1,386	2,952	2,579
Depreciation and amortization	1,161	1,011	2,307	1,992
TOTAL ADDITIONAL EXPENSES:	27,963	25,682	54,857	50,319
Income (Loss) from Operations	3,635	2,685	4,493	3,477
OTHER INCOME (EXPENSE):
Interest expense	(235)	(255)	(485)	(517)
Interest and other income	257	39	316	85
OTHER INCOME (EXPENSE)	22	(216)	(169)	(432)
Income (loss) before provision for income taxes:	3,657	2,469	4,324	3,045
Provision for income taxes	(311)	55	(346)	73
Net Income (Loss)	3,346	2,524	3,978	3,118
Less: Net Income attributable to noncontrolling interests	(656)	(582)	(1,233)	(1,067)
Net Income (Loss) Attributable to Flanigan's Enterprises, Inc.	2,690	1,942	2,745	2,051
Restaurant food sales [Member]
REVENUES:
TOTAL REVENUE	32,586	29,356	61,712	55,711
Intersegment revenues [Member]
REVENUES:
TOTAL REVENUE
Restaurant bar sales [Member]
REVENUES:
TOTAL REVENUE	8,194	7,740	16,156	15,203
Package goods sales [Member]
REVENUES:
TOTAL REVENUE	12,051	10,140	24,486	20,742
Cost of merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD	22,034	19,702	44,544	39,413
Intersegment Cost of Merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD
Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues	459	445
Intersegment Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Intersegment franchise-related revenues
Rental income [Member]
ADDITIONAL REVENUES:
Rental income	273	313	540	566
Intersegment rental income [Member]
ADDITIONAL REVENUES:
Intersegment rental income
Intersegment partnership income [Member]
ADDITIONAL REVENUES:
Intersegment partnership income
Other operating income [Member]
ADDITIONAL REVENUES:
Other revenues	69	75	110	124
Intersegment operating expenses [Member]
ADDITIONAL EXPENSES:
Intersegment operating expenses
Intersegment occupancy costs [Member]
ADDITIONAL EXPENSES:
Intersegment occupancy costs
Intersegment Selling, general and administrative expenses [Member]
ADDITIONAL EXPENSES:
Intersegment selling, general and administrative expenses
Intersegment interest expense [Member]
OTHER INCOME (EXPENSE):
Interest expense
Intersegment interest and other income [Member]
OTHER INCOME (EXPENSE):
Interest and other income
Payroll and related costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs
Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues			890	863
Intersegment payroll costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs
Restaurants [Member]
Capital Expenditures:
Consolidated Totals	598	2,494	1,117	3,638
Identifiable Assets:
Total identifiable assets	76,840		76,840		77,613
Package stores [Member]
Capital Expenditures:
Consolidated Totals	55	19	177	66
Identifiable Assets:
Total identifiable assets	23,365		23,365		23,084
Corporate [Member]
Capital Expenditures:
Consolidated Totals	333	423	437	610
Identifiable Assets:
Total identifiable assets	43,102		43,102		$ 41,385
Restaurant [Member]
REVENUES:
TOTAL REVENUE	41,872	38,162	79,972	72,937
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD	14,457	13,276	28,498	26,064
GROSS PROFIT:	27,415	24,886	51,474	46,873
ADDITIONAL REVENUES:
TOTAL ADDITIONAL REVENUES:	41	46	73	87
ADDITIONAL EXPENSES:
Payroll and related costs	13,125	12,187	26,247	24,119
Operating expenses	5,810	5,241	11,197	10,126
Occupancy costs	1,707	1,592	3,300	3,319
Selling, general and administrative expenses	376	361	860	569
Depreciation and amortization	887	751	1,767	1,474
TOTAL ADDITIONAL EXPENSES:	22,710	20,928	44,956	41,171
Income (Loss) from Operations	4,746	4,004	6,591	5,789
OTHER INCOME (EXPENSE):
Interest expense
Interest and other income	4	4	8	13
OTHER INCOME (EXPENSE)	4	4	8	13
Income (loss) before provision for income taxes:	4,750	4,008	6,599	5,802
Provision for income taxes
Net Income (Loss)	4,750	4,008	6,599	5,802
Less: Net Income attributable to noncontrolling interests	(656)	(582)	(1,233)	(1,067)
Net Income (Loss) Attributable to Flanigan's Enterprises, Inc.	4,094	3,426	5,366	4,735
Restaurant [Member] | Restaurant food sales [Member]
REVENUES:
TOTAL REVENUE	32,586	29,356	61,712	55,711
Restaurant [Member] | Intersegment revenues [Member]
REVENUES:
TOTAL REVENUE	1,092	1,066	2,104	2,023
Restaurant [Member] | Restaurant bar sales [Member]
REVENUES:
TOTAL REVENUE	8,194	7,740	16,156	15,203
Restaurant [Member] | Package goods sales [Member]
REVENUES:
TOTAL REVENUE
Restaurant [Member] | Cost of merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD	13,365	12,210	26,394	24,041
Restaurant [Member] | Intersegment Cost of Merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD	1,092	1,066	2,104	2,023
Restaurant [Member] | Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues
Restaurant [Member] | Intersegment Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Intersegment franchise-related revenues
Restaurant [Member] | Rental income [Member]
ADDITIONAL REVENUES:
Rental income
Restaurant [Member] | Intersegment rental income [Member]
ADDITIONAL REVENUES:
Intersegment rental income
Restaurant [Member] | Intersegment partnership income [Member]
ADDITIONAL REVENUES:
Intersegment partnership income
Restaurant [Member] | Other operating income [Member]
ADDITIONAL REVENUES:
Other revenues	41	46	73	87
Restaurant [Member] | Intersegment operating expenses [Member]
ADDITIONAL EXPENSES:
Intersegment operating expenses	638	629	1,252	1,232
Restaurant [Member] | Intersegment occupancy costs [Member]
ADDITIONAL EXPENSES:
Intersegment occupancy costs	167	167	333	332
Restaurant [Member] | Intersegment Selling, general and administrative expenses [Member]
ADDITIONAL EXPENSES:
Intersegment selling, general and administrative expenses
Restaurant [Member] | Intersegment interest expense [Member]
OTHER INCOME (EXPENSE):
Interest expense
Restaurant [Member] | Intersegment interest and other income [Member]
OTHER INCOME (EXPENSE):
Interest and other income
Restaurant [Member] | Payroll and related costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs
Restaurant [Member] | Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues
Restaurant [Member] | Intersegment payroll costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs
Package [Member]
REVENUES:
TOTAL REVENUE	12,051	10,140	24,486	20,742
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD	8,669	7,492	18,150	15,372
GROSS PROFIT:	3,382	2,648	6,336	5,370
ADDITIONAL REVENUES:
TOTAL ADDITIONAL REVENUES:
ADDITIONAL EXPENSES:
Payroll and related costs	843	735	1,745	1,578
Operating expenses	795	722	1,516	1,352
Occupancy costs	236	217	450	497
Selling, general and administrative expenses	51	40	87	90
Depreciation and amortization	126	125	251	252
TOTAL ADDITIONAL EXPENSES:	2,099	1,880	4,145	3,847
Income (Loss) from Operations	1,283	768	2,191	1,523
OTHER INCOME (EXPENSE):
Interest expense
Interest and other income	24	19	40	37
OTHER INCOME (EXPENSE)	24	24	40	47
Income (loss) before provision for income taxes:	1,307	792	2,231	1,570
Provision for income taxes
Net Income (Loss)	1,307	792	2,231	1,570
Less: Net Income attributable to noncontrolling interests
Net Income (Loss) Attributable to Flanigan's Enterprises, Inc.	1,307	792	2,231	1,570
Package [Member] | Restaurant food sales [Member]
REVENUES:
TOTAL REVENUE
Package [Member] | Intersegment revenues [Member]
REVENUES:
TOTAL REVENUE
Package [Member] | Restaurant bar sales [Member]
REVENUES:
TOTAL REVENUE
Package [Member] | Package goods sales [Member]
REVENUES:
TOTAL REVENUE	12,051	10,140	24,486	20,742
Package [Member] | Cost of merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD	8,669	7,492	18,150	15,372
Package [Member] | Intersegment Cost of Merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD
Package [Member] | Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues
Package [Member] | Intersegment Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Intersegment franchise-related revenues
Package [Member] | Rental income [Member]
ADDITIONAL REVENUES:
Rental income
Package [Member] | Intersegment rental income [Member]
ADDITIONAL REVENUES:
Intersegment rental income
Package [Member] | Intersegment partnership income [Member]
ADDITIONAL REVENUES:
Intersegment partnership income
Package [Member] | Other operating income [Member]
ADDITIONAL REVENUES:
Other revenues
Package [Member] | Intersegment operating expenses [Member]
ADDITIONAL EXPENSES:
Intersegment operating expenses
Package [Member] | Intersegment occupancy costs [Member]
ADDITIONAL EXPENSES:
Intersegment occupancy costs	48	47	96	90
Package [Member] | Intersegment Selling, general and administrative expenses [Member]
ADDITIONAL EXPENSES:
Intersegment selling, general and administrative expenses
Package [Member] | Intersegment interest expense [Member]
OTHER INCOME (EXPENSE):
Interest expense
Package [Member] | Intersegment interest and other income [Member]
OTHER INCOME (EXPENSE):
Interest and other income		5		10
Package [Member] | Payroll and related costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs		(6)
Package [Member] | Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues
Package [Member] | Intersegment payroll costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs				(12)
Corporate [Member]
REVENUES:
TOTAL REVENUE
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD
GROSS PROFIT:
ADDITIONAL REVENUES:
TOTAL ADDITIONAL REVENUES:	2,748	2,932	5,359	5,610
ADDITIONAL EXPENSES:
Payroll and related costs	2,216	2,050	3,938	3,660
Operating expenses	452	420	898	819
Occupancy costs	160	121	307	278
Selling, general and administrative expenses	1,031	985	2,005	1,920
Depreciation and amortization	148	135	289	266
TOTAL ADDITIONAL EXPENSES:	4,757	4,628	9,014	8,827
Income (Loss) from Operations	(2,009)	(1,696)	(3,655)	(3,217)
OTHER INCOME (EXPENSE):
Interest expense	(235)	(255)	(485)	(517)
Interest and other income	229	16	268	35
OTHER INCOME (EXPENSE)	(6)	(239)	(217)	(482)
Income (loss) before provision for income taxes:	(2,015)	(1,935)	(3,872)	(3,699)
Provision for income taxes	(311)	55	(346)	73
Net Income (Loss)	(2,326)	(1,880)	(4,218)	(3,626)
Less: Net Income attributable to noncontrolling interests
Net Income (Loss) Attributable to Flanigan's Enterprises, Inc.	(2,326)	(1,880)	(4,218)	(3,626)
Corporate [Member] | Restaurant food sales [Member]
REVENUES:
TOTAL REVENUE
Corporate [Member] | Intersegment revenues [Member]
REVENUES:
TOTAL REVENUE
Corporate [Member] | Restaurant bar sales [Member]
REVENUES:
TOTAL REVENUE
Corporate [Member] | Package goods sales [Member]
REVENUES:
TOTAL REVENUE
Corporate [Member] | Cost of merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD
Corporate [Member] | Intersegment Cost of Merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD
Corporate [Member] | Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues	459	445
Corporate [Member] | Intersegment Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Intersegment franchise-related revenues	1,389	1,535	2,830	3,094
Corporate [Member] | Rental income [Member]
ADDITIONAL REVENUES:
Rental income	273	313	540	566
Corporate [Member] | Intersegment rental income [Member]
ADDITIONAL REVENUES:
Intersegment rental income	215	213	429	421
Corporate [Member] | Intersegment partnership income [Member]
ADDITIONAL REVENUES:
Intersegment partnership income	384	397	633	629
Corporate [Member] | Other operating income [Member]
ADDITIONAL REVENUES:
Other revenues	28	29	37	37
Corporate [Member] | Intersegment operating expenses [Member]
ADDITIONAL EXPENSES:
Intersegment operating expenses	679	846	1,434	1,741
Corporate [Member] | Intersegment occupancy costs [Member]
ADDITIONAL EXPENSES:
Intersegment occupancy costs
Corporate [Member] | Intersegment Selling, general and administrative expenses [Member]
ADDITIONAL EXPENSES:
Intersegment selling, general and administrative expenses	71	71	143	143
Corporate [Member] | Intersegment interest expense [Member]
OTHER INCOME (EXPENSE):
Interest expense	(2)	(2)	(4)	(4)
Corporate [Member] | Intersegment interest and other income [Member]
OTHER INCOME (EXPENSE):
Interest and other income	2	2	4	4
Corporate [Member] | Payroll and related costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs
Corporate [Member] | Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues			890	863
Corporate [Member] | Intersegment payroll costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs
Eliminations [Member]
REVENUES:
TOTAL REVENUE	(1,092)	(1,066)	(2,104)	(2,023)
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD	(1,092)	(1,066)	(2,104)	(2,023)
GROSS PROFIT:
ADDITIONAL REVENUES:
TOTAL ADDITIONAL REVENUES:	(1,988)	(2,145)	(3,892)	(4,144)
ADDITIONAL EXPENSES:
Payroll and related costs
Operating expenses
Occupancy costs
Selling, general and administrative expenses
Depreciation and amortization
TOTAL ADDITIONAL EXPENSES:	(1,603)	(1,754)	(3,258)	(3,526)
Income (Loss) from Operations	(385)	(391)	(634)	(618)
OTHER INCOME (EXPENSE):
Interest expense
Interest and other income
OTHER INCOME (EXPENSE)		(5)		(10)
Income (loss) before provision for income taxes:	(385)	(396)	(634)	(628)
Provision for income taxes
Net Income (Loss)	(385)	39	(634)	(628)
Less: Net Income attributable to noncontrolling interests
Net Income (Loss) Attributable to Flanigan's Enterprises, Inc.	(385)	(396)	(634)	(628)
Eliminations [Member] | Restaurant food sales [Member]
REVENUES:
TOTAL REVENUE
Eliminations [Member] | Intersegment revenues [Member]
REVENUES:
TOTAL REVENUE	(1,092)	(1,066)	(2,104)	(2,023)
Eliminations [Member] | Restaurant bar sales [Member]
REVENUES:
TOTAL REVENUE
Eliminations [Member] | Package goods sales [Member]
REVENUES:
TOTAL REVENUE
Eliminations [Member] | Cost of merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD
Eliminations [Member] | Intersegment Cost of Merchandise sold [Member]
COST OF MERCHANDISE SOLD:
TOTAL COST OF MERCHANDISE SOLD	(1,092)	(1,066)	(2,104)	(2,023)
Eliminations [Member] | Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues
Eliminations [Member] | Intersegment Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Intersegment franchise-related revenues	(1,389)	(1,535)	(2,830)	(3,094)
Eliminations [Member] | Rental income [Member]
ADDITIONAL REVENUES:
Rental income
Eliminations [Member] | Intersegment rental income [Member]
ADDITIONAL REVENUES:
Intersegment rental income	(215)	(213)	(429)	(421)
Eliminations [Member] | Intersegment partnership income [Member]
ADDITIONAL REVENUES:
Intersegment partnership income	(384)	(397)	(633)	(629)
Eliminations [Member] | Other operating income [Member]
ADDITIONAL REVENUES:
Other revenues
Eliminations [Member] | Intersegment operating expenses [Member]
ADDITIONAL EXPENSES:
Intersegment operating expenses	(1,317)	(1,475)	(2,686)	(2,973)
Eliminations [Member] | Intersegment occupancy costs [Member]
ADDITIONAL EXPENSES:
Intersegment occupancy costs	(215)	(214)	(429)	(422)
Eliminations [Member] | Intersegment Selling, general and administrative expenses [Member]
ADDITIONAL EXPENSES:
Intersegment selling, general and administrative expenses	(71)	(71)	(143)	(143)
Eliminations [Member] | Intersegment interest expense [Member]
OTHER INCOME (EXPENSE):
Interest expense	2	2	4	4
Eliminations [Member] | Intersegment interest and other income [Member]
OTHER INCOME (EXPENSE):
Interest and other income	$ (2)	(7)	(4)	(14)
Eliminations [Member] | Payroll and related costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs		$ 6
Eliminations [Member] | Franchise-related revenues [Member]
ADDITIONAL REVENUES:
Franchise-related revenues
Eliminations [Member] | Intersegment payroll costs [Member]
ADDITIONAL EXPENSES:
Intersegment payroll costs				$ 12