Equity - Schedule of Changes in Stockholders' Equity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Class of Stock [Line Items]
Beginning balance	$ 89,624	$ 82,663
Cumulative effect of accounting change		(1,634)
Common stock issued under employee plans	993	1,732
Equity-based compensation expense	756	817
Net loss	(2,392)	(5,136)
Other comprehensive income	106	76
Ending balance	89,087	78,518
Common Stock and Additional Paid-in Capital
Class of Stock [Line Items]
Beginning balance	183,227	177,543
Common stock issued under employee plans	993	1,732
Equity-based compensation expense	756	817
Ending balance	184,976	180,092
Treasury Stock
Class of Stock [Line Items]
Beginning balance	(29,047)	(28,489)
Ending balance	(29,047)	(28,489)
Accumulated Other Comprehensive Income
Class of Stock [Line Items]
Beginning balance	378	490
Other comprehensive income	106	76
Ending balance	484	566
Accumulated Deficit
Class of Stock [Line Items]
Beginning balance	(64,934)	(66,881)
Cumulative effect of accounting change		(1,634)
Net loss	(2,392)	(5,136)
Ending balance	$ (67,326)	$ (73,651)