Stockholders' Equity - Summary of Changes In Stockholders' Equity (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Value, Issued beginning balance			$ 0
Capital in excess of par value beginning balance			359,233,000
Retained earnings beginning balance			(95,199,000)
Accumulated other comprehensive income beginning balance	$ (1,586,000)		(1,586,000)
Beginning Balance			262,148,000
Net income (loss)	(8,965,000)	$ (5,930,000)	3,256,000	$ 11,292,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	145,000	$ 420,000	300,000	539,000
Total components of other comprehensive income (loss), net of tax			300,000
Stock-based compensation costs			233,000
Adjustments to Additional Paid in Capital, Other			0	$ 1,447,000
Common Stock, Value, Issued ending balance	0		0
Capital in excess of par value ending balance	359,466,000		359,466,000
Retained earnings ending balance	(91,943,000)		(91,943,000)
Accumulated other comprehensive income ending balance			(1,886,000)
Ending Balance	$ 265,937,000		$ 265,937,000
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)			200
Common Stock, Value, Issued beginning balance			$ 0
Ending Balance (in shares)	200		200
Common Stock, Value, Issued ending balance	$ 0		$ 0
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital in excess of par value beginning balance			359,233,000
Stock-based compensation costs			233,000
Capital in excess of par value ending balance	359,466,000		359,466,000
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings beginning balance			(95,199,000)
Net income (loss)			3,256,000
Retained earnings ending balance	(91,943,000)		(91,943,000)
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income beginning balance	$ (1,586,000)		(1,586,000)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax			300,000
Accumulated other comprehensive income ending balance			$ (1,886,000)