Financial Instruments - Cash, Cash Equivalents and Short-Term Investments and Long-Term Investments (Detail) - USD ($) $ in Thousands	Jan. 01, 2022	Jan. 02, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 120,406	$ 49,530
Unrealized Holding Gains		38
Unrealized Holding Losses	30
Fair Value	120,376	49,568
Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	102,728	29,341
Fair Value	102,728	29,341
Cash and Cash Equivalents \| Cash
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	102,494	24,729
Fair Value	102,494	24,729
Cash and Cash Equivalents \| Money market funds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	234	3,612
Fair Value	234	3,612
Cash and Cash Equivalents \| Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		1,000
Fair Value		1,000
Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,226	14,806
Unrealized Holding Gains		33
Unrealized Holding Losses	5
Fair Value	10,221	14,839
Short-term Investments \| Corporate bonds and medium-term notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,916	2,929
Unrealized Holding Gains		6
Unrealized Holding Losses	3
Fair Value	2,913	2,935
Short-term Investments \| Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	700	400
Fair Value	700	400
Short-term Investments \| U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,910	4,527
Unrealized Holding Gains		25
Unrealized Holding Losses	2
Fair Value	1,908	4,552
Short-term Investments \| Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,300	6,450
Unrealized Holding Gains		2
Fair Value	4,300	6,452
Short-term Investments \| Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	400	500
Fair Value	400	500
Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,452	5,383
Unrealized Holding Gains		5
Unrealized Holding Losses	25
Fair Value	7,427	5,388
Long-term Investments \| Asset backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,040
Unrealized Holding Losses	3
Fair Value	2,037
Long-term Investments \| Corporate bonds and medium-term notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,521	3,474
Unrealized Holding Gains		4
Unrealized Holding Losses	6
Fair Value	1,515	3,478
Long-term Investments \| Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	145
Unrealized Holding Losses	1
Fair Value	144
Long-term Investments \| U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,246	1,409
Unrealized Holding Gains		1
Unrealized Holding Losses	12
Fair Value	3,234	1,410
Long-term Investments \| Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	500	500
Unrealized Holding Losses	3
Fair Value	$ 497	$ 500

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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