Organization and Significant Accounting Policies - Customers as Percentage of Total Sales (Detail) - Sales [Member] - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Jun. 24, 2016	Jun. 26, 2015	Jun. 24, 2016	Jun. 26, 2015
Concentration Risk [Line Items]
Total	82.40%	81.20%	81.20%	78.30%
Lam Research Corporation [Member]
Concentration Risk [Line Items]
Total	55.40%	55.40%	56.00%	50.90%
Applied Materials, Inc. [Member]
Concentration Risk [Line Items]
Total	27.00%	25.80%	25.20%	27.40%