Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Net loss	$ (13,801)	$ (69,692)	$ (32,424)
Net income (loss) attributable to noncontrolling interest	0	8	(243)
Net loss attributable to Cohu	(13,801)	(69,700)	(32,181)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	27,321	(7,522)	(8,905)
Adjustments related to postretirement benefits	2,383	(628)	805
Change in unrealized gain/loss on investments	0	0	7
Other comprehensive income (loss), net of tax	29,704	(8,150)	(8,093)
Other comprehensive income (loss) attributable to noncontrolling interest	0	(4)	(5)
Other comprehensive income (loss) attributable to Cohu	29,704	(8,146)	(8,088)
Comprehensive income (loss)	15,903	(77,842)	(40,517)
Comprehensive income (loss) attributable to noncontrolling interest	0	4	(248)
Comprehensive income (loss) attributable to Cohu	$ 15,903	$ (77,846)	$ (40,269)