Other Long Term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Other Long Term Liabilities [Line Items]
Deferred rent	$ 2,392	$ 1,190
Acquisition-related contingent consideration	430	711
Accrued income taxes	82	363
Accrued product warranties	178	147
Total other long-term liabilities	$ 3,082	$ 2,411