Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Jan. 01, 2021	Jan. 03, 2020
Allowance For Bad Debt [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		$ 879	$ 945	$ 847
Provision Charged to Expense		454	443	484
Provision Charged to Revenues		0	0	0
Accounts Written-off Net of Recoveries	[1]	(360)	(509)	(386)
Balance at End of Year		973	879	945
Allowance For Contract Losses [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		3,116	3,350	3,219
Provision Charged to Expense		0	0	0
Provision Charged to Revenues		1,505	1,406	1,740
Accounts Written-off Net of Recoveries	[1]	(1,171)	(1,640)	(1,609)
Balance at End of Year		$ 3,450	$ 3,116	$ 3,350

[1] Balance includes currency translation adjustments.