Consolidated Statements of Changes in Stockholder's Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]
Beginning balance (in shares) at Dec. 30, 2018		35,742,000
Beginning balance at Dec. 30, 2018	$ 185,540	$ 357	$ 0	$ 150,459	$ 35,511	$ (646)	$ (141)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,526			1,526
Vesting of non-vested shares (in shares)		372,000
Net loss	0	$ 4		(4)
Net income (loss)	(11,469)
Ending balance (in shares) at Mar. 31, 2019		36,114,000
Ending balance at Mar. 31, 2019	$ 183,101	$ 361	$ 0	151,981	31,546	(646)	(141)
Beginning balance (in shares) at Dec. 29, 2019	5,104,937	51,049,000	100,000
Beginning balance at Dec. 29, 2019	$ 309,462	$ 510	$ 0	301,251	11,096	622	(4,017)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,132
Vesting of non-vested shares (in shares)		425,000
Net loss	0	$ 5		(5)
Net income (loss)	(22,209)
Retirement of treasury stock	(54)						(54)
Change in valuation of interest rate swap	$ (5,209)					(5,209)
Ending balance (in shares) at Mar. 29, 2020	51,474,340	51,474,000	100,000
Ending balance at Mar. 29, 2020	$ 283,122	$ 515	$ 0	$ 302,378	$ (11,113)	$ (4,587)	$ (4,071)