Segment and Geographic Data - Sources of Revenue and Other Information by Geographic Area (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 30, 2023	Sep. 30, 2023	Jul. 01, 2023	Apr. 01, 2023	Dec. 31, 2022	Oct. 01, 2022	Jul. 02, 2022	Apr. 02, 2022	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues, net		$ 205,955	$ 214,871	$ 226,830	$ 241,895	$ 222,902	$ 249,718	$ 269,454	$ 297,761	$ 889,551	$ 1,039,835	$ 1,211,165
Long-lived assets	[1]	19,741				28,229				19,741	28,229
Operating lease assets		52,272				75,696				52,272	75,696
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues, net										604,441	682,428	760,384
Long-lived assets	[1]	18,171				24,417				18,171	24,417
Operating lease assets		48,870				68,062				48,870	68,062
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues, net										97,085	116,452	147,273
Long-lived assets	[1]	418				459				418	459
Operating lease assets		446				702				446	702
Other
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues, net										188,025	240,955	$ 303,508
Long-lived assets	[1]	1,152				3,353				1,152	3,353
Operating lease assets		$ 2,956				$ 6,932				$ 2,956	$ 6,932

[1] Amounts include finance lease assets