Consolidated Statement of Stockholders' Equity - USD ($)	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 Dec. 30, 2012	$ 90,173,000	$ 227,000	$ 0	$ 68,056,000	$ 21,362,000	$ 669,000	$ (141,000)
Common stock, shares outstanding at Dec. 30, 2012		22,748,241
Stock-based compensation	1,205,000	$ 0	0	1,205,000	0	0	0
Vesting of non-vested shares and excess tax benefits	0	$ 3,000	0	(3,000)	0	0	0
Vesting of non-vested shares, shares		300,093
Distribution of Net Assets, Spin-Off	(688,000)				(688,000)
Net income (loss)	(13,519,000)	$ 0	0	0	(13,519,000)	0	0
Change in postretirement benefit obligations	33,000	$ 0	0	0	0	33,000	0
Common stock, shares outstanding at Dec. 29, 2013		23,048,334
Balance at Dec. 29, 2013	77,204,000	$ 230,000	0	69,258,000	7,155,000	702,000	(141,000)
Stock-based compensation	1,180,000	0	0	1,180,000	0	0	0
Vesting of non-vested shares and excess tax benefits	$ 0	$ 3,000	0	(3,000)	0	0	0
Vesting of non-vested shares, shares		278,906
Stock Issued During Period, Shares, New Issues	11,500,000
Issuance of preferred stock	$ 67,327,000	$ 115,000	0	67,212,000	0	0	0
Net income (loss)	(38,117,000)	0	0	0	(38,117,000)	0	0
Change in postretirement benefit obligations	$ (1,059,000)	$ 0	0	0	0	(1,059,000)	0
Common stock, shares outstanding at Dec. 28, 2014	34,827,240	34,827,240
Balance at Dec. 28, 2014	$ 106,535,000	$ 348,000	0	137,647,000	(30,962,000)	(357,000)	(141,000)
Stock-based compensation	1,438,000	0	0	1,438,000	0	0	0
Vesting of non-vested shares and excess tax benefits	0	$ 2,000	0	(2,000)	0	0	0
Vesting of non-vested shares, shares		212,650
Net income (loss)	4,000	$ 0	0	0	4,000	0	0
Change in postretirement benefit obligations	$ 22,000	$ 0	0	0	0	22,000	0
Common stock, shares outstanding at Jan. 03, 2016	35,039,890	35,039,890
Balance at Jan. 03, 2016	$ 107,999,000	$ 350,000	$ 0	$ 139,083,000	$ (30,958,000)	$ (335,000)	$ (141,000)