Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Net income (loss)	$ 167,325	$ (13,801)	$ (69,692)
Net income from noncontrolling interest	0	0	8
Net income (loss) attributable to Cohu	167,325	(13,801)	(69,700)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	(22,956)	27,321	(7,522)
Adjustments related to postretirement benefits, net of tax	2,602	2,383	(628)
Change in unrealized gain/loss on investments	(67)	0	0
Reclassification due to sale of PBC Test Business, net of tax	(2,515)	0	0
Other comprehensive income (loss), net of tax	(22,936)	29,704	(8,150)
Other comprehensive loss attributable to noncontrolling interest	0	0	(4)
Other comprehensive income (loss) attributable to Cohu	(22,936)	29,704	(8,146)
Comprehensive income (loss)	144,389	15,903	(77,842)
Comprehensive income attributable to noncontrolling interest	0	0	4
Comprehensive income (loss) attributable to Cohu	$ 144,389	$ 15,903	$ (77,846)