Segment, Geographic, Product and Significant Customer Information - Textual (Details) - segment	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
Revenues From External Customers And Long Lived Assets [Line Items]
Number of operating segments			1
Samsung Electronics Co. Ltd. [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage	10.00%	10.00%	10.00%	10.00%
Samsung Electronics Co. Ltd. [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage					10.00%
Yangtze Memory Technologies Co. Ltd. [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage	10.00%		10.00%
SK Hynix [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage	10.00%		10.00%	10.00%
SK Hynix [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage			10.00%
Toshiba Corporation [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage	10.00%		10.00%
Toshiba Corporation [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage			10.00%
Micron Technology, Inc. [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage		10.00%	10.00%	10.00%
Micron Technology, Inc. [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage					10.00%
Intel Corporation [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage		10.00%		10.00%
Intel Corporation [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Customer concentration risk percentage					10.00%