Segment, Geographic, Product and Significant Customer Information - Textual (Details) - segment	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Dec. 29, 2018
Concentration Risk [Line Items]
Number of operating segments			1
SK Hynix [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage	10.00%		10.00%	10.00%
SK Hynix [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage			10.00%		10.00%
Micron Technology, Inc. [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage	10.00%			10.00%
Micron Technology, Inc. [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage			10.00%
Yangtze Memory Technologies Co. Ltd. [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage	10.00%	10.00%		10.00%
Yangtze Memory Technologies Co. Ltd. [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage			10.00%
Intel [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage		10.00%	10.00%	10.00%
Taiwan Semiconductor [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage			10.00%
Samsung Electronics Co. Ltd. [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage		10.00%		10.00%
Toshiba Memory Corporation [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage		10.00%		10.00%
Toshiba Memory Corporation [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer concentration risk percentage					10.00%