Condensed Consolidated Statements of Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in-Capital [Member]	Accumulated Deficit [Member]	Non-Controlling Interest [Member]
Beginning balance at Dec. 30, 2018	$ 95,533	$ 330	$ (108,372)	$ 432,771	$ (229,558)	$ 362
Beginning balance, common shares at Dec. 30, 2018		24,143
Cumulative impact | ASU 2016-02 (Topic 842) [Member]	(531)				(531)
Net income (loss)	(18,374)				(18,439)	65
Stock-based compensation plans	170			170
Stock-based compensation plans, shares		33
Repurchases of common stock	(1,144)		(1,144)
Repurchases of common stock, shares		(135)
Treasury shares used for stock-based plans	(25)		(25)
Treasury shares used for stock-based plans, shares		(3)
Stock-based compensation expense	459			459
Ending balance at Mar. 31, 2019	76,088	$ 330	(109,541)	433,400	(248,528)	427
Ending balance, common shares at Mar. 31, 2019		24,038
Beginning balance at Dec. 29, 2019	$ 69,169	$ 331	(112,680)	435,278	(254,081)	321
Beginning balance, common shares at Dec. 29, 2019	23,638	23,638
Cumulative impact | ASU 2016-13 (Topic 326) [Member]	$ (5)				(5)
Net income (loss)	(13,350)				(13,336)	(14)
Stock-based compensation plans, shares		68
Treasury shares used for stock-based plans	(71)		(71)
Treasury shares used for stock-based plans, shares		(22)
Distributions to non-controlling interest	(172)					(172)
Contributions from non-controlling interest	143					143
Stock-based compensation expense	490			490
Ending balance at Mar. 29, 2020	$ 56,204	$ 331	$ (112,751)	$ 435,768	$ (267,422)	$ 278
Ending balance, common shares at Mar. 29, 2020	23,684	23,684