Changes in Accumulated Other Comprehensive Income by Component (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 412	$ 619
Other comprehensive income before reclassification	111	29
Amounts reclassified from other comprehensive income	0	0
Net current-period other comprehensive income	111	29
Ending balance	523	648
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	452	620
Other comprehensive income before reclassification	67
Amounts reclassified from other comprehensive income	0	0
Net current-period other comprehensive income	67
Ending balance	519	620
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(40)	(1)
Other comprehensive income before reclassification	44	29
Amounts reclassified from other comprehensive income	0	0
Net current-period other comprehensive income	44	29
Ending balance	$ 4	$ 28