Organization and Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended								3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended	3 Months Ended
	Mar. 28, 2014 Segment	Dec. 27, 2013	Mar. 29, 2013	Dec. 28, 2012	Mar. 28, 2014 China [Member]	Mar. 28, 2014 Subsidiaries [Member] China [Member]	Dec. 27, 2013 Subsidiaries [Member] China [Member]	Mar. 28, 2014 Money market fund deposits [Member]	Mar. 28, 2014 Customer concentration risk [Member] Customer	Dec. 27, 2013 Customer concentration risk [Member] Customer	Mar. 28, 2014 Level 2 [Member] Money market fund deposits [Member]	Mar. 28, 2014 Accounts receivable [Member] Customer concentration risk [Member]	Dec. 27, 2013 Accounts receivable [Member] Customer concentration risk [Member]	Mar. 28, 2014 Sales [Member] Customer	Mar. 29, 2013 Sales [Member] Customer	Mar. 28, 2014 Sales [Member] Customer concentration risk [Member]	Mar. 29, 2013 Sales [Member] Customer concentration risk [Member]	Mar. 28, 2014 Sales [Member] International Sales [Member]	Mar. 29, 2013 Sales [Member] International Sales [Member]	Mar. 28, 2014 Maximum [Member]
Concentration Risk [Line Items]
Number of reportable segments	1
Concentration percentage												76.00%	82.00%			79.00%	88.40%	26.70%	17.20%
Fiscal year duration	52-53 week
Number of customers equal or exceeding 10% threshold														3	4
Number of customers with accounts receivable greater than 10%									3	3
Carrying value of cash and cash equivalents	$ 74,289,000	$ 60,415,000	$ 64,943,000	$ 54,311,000				$ 10,000,000
Fair value of cash and cash equivalents											10,000,000
Valuation allowance on deferred tax assets					$ 700,000	$ 654,000	$ 654,000
Product warranty period (in years)																				2 years
Measurement period to determine fair value of assets and liabilities																				12 months