Consolidated Statements of Changes in Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance (in shares) at Jan. 03, 2016		200
Beginning balance at Jan. 03, 2016	$ 208,546	$ 0	$ 356,460	$ (144,598)	$ (3,316)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(3,667)
Other comprehensive income (loss)	420				420
Stock-based compensation costs	702		702
Restricted stock issued, net of forfeitures	4
Tax benefit from restricted stock, net			4
Ending Balance (in shares) at Jan. 01, 2017		200
Ending balance at Jan. 01, 2017	206,005	$ 0	357,166	(148,265)	(2,896)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	53,066
Other comprehensive income (loss)	1,010				1,010
Stock-based compensation costs	620		620
Restricted stock issued, net of forfeitures	1,447
Tax benefit from restricted stock, net			1,447
Ending Balance (in shares) at Dec. 31, 2017		200
Ending balance at Dec. 31, 2017	262,148	$ 0	359,233	(95,199)	(1,886)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(20,461)
Other comprehensive income (loss)	547				547
Stock-based compensation costs	337		337
Ending Balance (in shares) at Dec. 30, 2018		200
Ending balance at Dec. 30, 2018	$ 242,571	$ 0	$ 359,570	$ (115,660)	$ (1,339)