Revenue Recognition - Additional Information (Detail) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 30, 2018 USD ($) Segment Customer	Dec. 29, 2017 Customer
Concentration Risk [Line Items]
Number of reportable segments | Segment	1
Accrued Expenses [Member]
Concentration Risk [Line Items]
Unpaid customer rebates | $	$ 0.3
Maximum [Member]
Concentration Risk [Line Items]
Product warranty period (in years)	2 years
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
Customer Concentration Risk [Member] | Lam Research Corporation and Applied Materials, Inc. [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration percentage	69.50%	75.80%