Condensed Consolidated Statements of Changes in Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands		Total	Class A Shares	Class B Shares	Class A par value	Class B par value	Additional paid-in capital	Total Common Stock	Preferred Stock Shares	Preferred Stock Par Value	Additional paid-in capital	Total Preferred Stock	Non- controlling interest	Accumulated deficit
Beginning balance (in shares) at Dec. 29, 2019			11,860,299	0					0
Beginning balance, value at Dec. 29, 2019		$ 5,378			$ 1	$ 0	$ 11,413	$ 11,414		$ 0	$ 0	$ 0	$ 0	$ (6,036)
Net loss		(7,189)												(7,189)
Issuance of common stock in lieu of cash directors' fees payable (in shares)			65,965
Issuance of common stock in lieu of cash directors’ fees payable		240					240	240
Issuance of preferred stock (in shares)									360,000
Issuance of preferred stock		6,033									6,033	6,033
Exchange of original Series B preferred stock for newly issued Series B preferred stock (in shares)									60,677
Exchange of original Series B preferred stock for newly issued Series B preferred stock		1,224									1,224	1,224
Exchange of Series A preferred stock for newly issued Series B preferred stock (in shares)									74,449
Exchange of Series A preferred stock for newly issued Series B preferred stock		1,861									1,861	1,861
Exchange of Series A-1 preferred stock for newly issued Series B preferred stock (in shares)									168,001
Exchange of Series A-1 preferred stock for newly issued Series B preferred stock		4,200									4,200	4,200
Share-based compensation		61					61	61
Extinguishment of derivative liability		(887)					(887)	(887)
Grant of warrants to purchase stock		2,258					2,258	2,258
Repurchase of warrants		(330)					(330)	(330)
Dividends declared on Series B preferred stock		(277)									(277)	(277)
Correction of recorded conversion rights associated with Series A-1 preferred shares		(90)					(90)	(90)
Ending balance (in shares) at Sep. 27, 2020			11,926,264	0					663,127
Ending balance, value at Sep. 27, 2020		12,482			1	0	12,665	12,666		0	13,041	13,041	0	(13,225)
Beginning balance (in shares) at Jun. 28, 2020			11,894,895	0					0
Beginning balance, value at Jun. 28, 2020		(3,588)			1	0	9,068	9,069		0	0	0	0	(12,657)
Net loss		(568)												(568)
Issuance of common stock in lieu of cash directors' fees payable (in shares)			31,369
Issuance of common stock in lieu of cash directors’ fees payable		105					105	105
Issuance of preferred stock (in shares)									360,000
Issuance of preferred stock		6,033									6,033	6,033
Exchange of original Series B preferred stock for newly issued Series B preferred stock (in shares)									60,677
Exchange of original Series B preferred stock for newly issued Series B preferred stock		1,224									1,224	1,224
Exchange of Series A preferred stock for newly issued Series B preferred stock (in shares)									74,449
Exchange of Series A preferred stock for newly issued Series B preferred stock		1,861									1,861	1,861
Exchange of Series A-1 preferred stock for newly issued Series B preferred stock (in shares)									168,001
Exchange of Series A-1 preferred stock for newly issued Series B preferred stock		4,200									4,200	4,200
Share-based compensation		45					45	45
Extinguishment of derivative liability		1,516					1,516	1,516
Grant of warrants to purchase stock		2,261					2,261	2,261
Repurchase of warrants		(330)					(330)	(330)
Dividends declared on Series B preferred stock		(277)									(277)	(277)
Ending balance (in shares) at Sep. 27, 2020			11,926,264	0					663,127
Ending balance, value at Sep. 27, 2020		12,482			1	0	12,665	12,666		0	13,041	13,041	0	(13,225)
Beginning balance (in shares) at Dec. 27, 2020			11,926,264	0					1,183,272
Beginning balance, value at Dec. 27, 2020		(41,883)			1	0	(42,776)	(42,775)		0	21,788	21,788	0	(20,896)
Net loss		(11,998)											(19)	(11,979)
Issuance of common stock through exercise of warrants (in shares)			464,643
Issuance of common stock through exercise of warrants		2,193					1,799	1,799			394	394
Issuance of preferred stock (in shares)									460,000
Issuance of preferred stock		8,246									8,246	8,246
Share-based compensation (in shares)			300,000
Share-based compensation		488					488	488
Measurement period adjustment in accordance with ASU 2015-16		(1,381)					(1,381)	(1,381)
Stock contracted for issue in payment of debt (in shares)			62,500
Stock contracted for issue in payment of debt		816					816	816
Sale of interest in operating restaurant		749					651	651					98
Dividends declared on common stock		(5,313)					(5,313)	(5,313)
Dividends declared on Series B preferred stock		(2,084)									(2,084)	(2,084)
Issuance of common stock in connection with acquisition of LS GFG Holdings Inc. (in shares)	[1]		1,964,865
Issuance of common stock in connection with acquisition of LS GFG Holdings Inc.	[1]	21,809					21,809	21,809
Stock dividend of Class B Shares (in shares)			294,729	1,270,683
Stock dividend of Class B Shares		(25)			1		(26)	(25)
Series A Preferred shares retired through issuance of Series B Preferred shares		9,564									9,564	9,564
Ending balance (in shares) at Sep. 26, 2021			15,013,001	1,270,683					1,643,272
Ending balance, value at Sep. 26, 2021		(18,819)			2	0	(23,933)	(23,931)		0	37,908	37,908	79	(32,875)
Beginning balance (in shares) at Jun. 27, 2021			12,491,528	0					1,643,272
Beginning balance, value at Jun. 27, 2021		(45,155)			1	0	(45,087)	(45,086)		0	29,092	29,092	93	(29,254)
Net loss		(3,635)											(14)	(3,621)
Issuance of common stock through exercise of warrants (in shares)			199,379
Issuance of common stock through exercise of warrants		810					659	659			151	151
Issuance of preferred stock		(35)									(35)	(35)
Share-based compensation		258					258	258
Measurement period adjustment in accordance with ASU 2015-16		70					70	70
Stock contracted for issue in payment of debt (in shares)			62,500
Stock contracted for issue in payment of debt		0
Sale of interest in operating restaurant		500					500	500
Dividends declared on common stock		(2,116)					(2,116)	(2,116)
Dividends declared on Series B preferred stock		(864)									(864)	(864)
Issuance of common stock in connection with acquisition of LS GFG Holdings Inc. (in shares)	[1]		1,964,865
Issuance of common stock in connection with acquisition of LS GFG Holdings Inc.	[1]	21,809					21,809	21,809
Stock dividend of Class B Shares (in shares)			294,729	1,270,683
Stock dividend of Class B Shares		(25)			1		(26)	(25)
Series A Preferred shares retired through issuance of Series B Preferred shares		9,564									9,564	9,564
Ending balance (in shares) at Sep. 26, 2021			15,013,001	1,270,683					1,643,272
Ending balance, value at Sep. 26, 2021		$ (18,819)			$ 2	$ 0	$ (23,933)	$ (23,931)		$ 0	$ 37,908	$ 37,908	$ 79	$ (32,875)

[1] Excludes 3,089,245 shares of preferred stock classified as redeemable preferred stock as of September 26, 2021. (See Note 15)