Information Regarding Other Acquisition Related Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	$ 8,387	$ 8,387
Accumulated Amortization	6,129	5,275
Finite Lived, Net Carrying Amount	2,258	3,112
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	3,119	3,119
Accumulated Amortization	2,869	2,646
Finite Lived, Net Carrying Amount	250	473
Purchased technology
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	5,148	5,148
Accumulated Amortization	3,140	2,509
Finite Lived, Net Carrying Amount	2,008	2,639
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	40	40
Accumulated Amortization	40	40
Backlog
Finite-Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	80	80
Accumulated Amortization	$ 80	$ 80