Organization and Significant Accounting Policies - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 29, 2017 USD ($) Customer Segment	Dec. 30, 2016 USD ($) Customer	Dec. 25, 2015 USD ($)
Concentration Risk [Line Items]
Inventory	$ 236,840	$ 103,861
Net of reserves	7,900	6,900
Inventory write-downs	2,600	2,300	$ 2,400
Valuation allowance on deferred tax assets	$ 8,100	$ 23,800
Number of reportable segments | Segment	1
U.S. Federal and State [Member]
Concentration Risk [Line Items]
Valuation allowance on deferred tax assets	$ 7,900
Singapore Subsidiaries [Member]
Concentration Risk [Line Items]
Valuation allowance on deferred tax assets	$ 200
Customer Concentration Risk [Member] | Lam Research Corporation and Applied Materials, Inc. [Member]
Concentration Risk [Line Items]
Number of customers with accounts receivable greater than 10% | Customer	2	2
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Lam Research Corporation and Applied Materials, Inc. [Member]
Concentration Risk [Line Items]
Concentration percentage	75.80%	85.00%
Minimum [Member]
Concentration Risk [Line Items]
Fiscal year duration	364 days
Useful lives range	3 years
Minimum [Member] | Internal Use Software [Member]
Concentration Risk [Line Items]
Useful lives range	3 years
Maximum [Member]
Concentration Risk [Line Items]
Fiscal year duration	371 days
Useful lives range	15 years
Product warranty period (in years)	2 years
Measurement period to determine fair value of assets and liabilities	12 months
Maximum [Member] | Internal Use Software [Member]
Concentration Risk [Line Items]
Useful lives range	5 years