Schedule of Segment Reporting Information by Segment Charges (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2023	Apr. 03, 2022
Segment Reporting Information [Line Items]
Restructuring and other—employee severance	$ 2,037	$ 15,714
Semiconductor Test
Segment Reporting Information [Line Items]
Cost of revenues—inventory charge	3,768	0
Restructuring and other—employee severance	794	0
System Test
Segment Reporting Information [Line Items]
Cost of revenues—inventory charge	675	0
Robotics
Segment Reporting Information [Line Items]
Cost of revenues—inventory charge	782	0
Restructuring and other—employee severance	659	0
Wireless Test
Segment Reporting Information [Line Items]
Cost of revenues—inventory charge	0	877
Corporate and Other | Selling and administrative—equity modification charge
Segment Reporting Information [Line Items]
Selling and administrative—equity modification charge	5,889	0
Corporate and Other | Restructuring and other
Segment Reporting Information [Line Items]
Restructuring and other—employee severance	$ 0	$ 14,700