Consolidated Statement of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance at Jan. 01, 2012	$ 59,157	$ 218	$ 0	$ 6,954	$ 51,041	$ 1,085	$ (141)
Common stock, shares outstanding at Jan. 01, 2012		21,750,237
Stock-based compensation	2,169	0	0	2,169	0	0	0
Exercise of stock options	295	0	0	295	0	0	0
Exercise of stock options, shares		69,824
Conversion of stock options, shares		666,090
Conversion of stock options	0	7	0	(7)	0	0	0
Vesting of non-vested shares and excess tax benefits	936	2	0	934	0	0	0
Vesting of non-vested shares, shares		262,090
Issuance of preferred stock	57,711	0	0	57,711	0	0	0
Distribution of Fiesta Restaurant Group's net assets	(10,791)				(10,791)
Net income (loss)	(18,888)	0	0	0	(18,888)	0	0
Change in valuation of interest rate swap	68	0	0	0	0	68	0
Change in postretirement benefit obligations	(484)	0	0	0	0	(484)	0
Balance at Dec. 30, 2012	90,173	227	0	68,056	21,362	669	(141)
Common stock, shares outstanding at Dec. 30, 2012		22,748,241
Stock-based compensation	1,205	0	0	1,205	0	0	0
Vesting of non-vested shares and excess tax benefits	0	3	0	(3)	0	0	0
Vesting of non-vested shares, shares		300,093
Distribution of Fiesta Restaurant Group's net assets	(688)	0	0	0	(688)	0	0
Net income (loss)	(13,519)	0	0	0	(13,519)	0	0
Change in valuation of interest rate swap	0
Change in postretirement benefit obligations	33	0	0	0	0	33	0
Balance at Dec. 29, 2013	77,204	230	0	69,258	7,155	702	(141)
Common stock, shares outstanding at Dec. 29, 2013	23,048,334	23,048,334
Stock-based compensation	1,180	0	0	1,180	0	0	0
Vesting of non-vested shares and excess tax benefits	0	3	0	(3)	0	0	0
Vesting of non-vested shares, shares		278,906
Issuance of preferred stock	67,327	115	0	67,212	0	0	0
Net income (loss)	(38,117)	0	0	0	(38,117)	0	0
Change in valuation of interest rate swap	0
Change in postretirement benefit obligations	(1,059)	0	0	0	0	(1,059)	0
Balance at Dec. 28, 2014	$ 106,535	$ 348	$ 0	$ 137,647	$ (30,962)	$ (357)	$ (141)
Common stock, shares outstanding at Dec. 28, 2014	34,827,240	34,827,240