Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Net loss	$ (6,646)	$ (10,326)	$ (28,662)	$ (52,372)
Net income attributable to noncontrolling interest	0	142	0	62
Net loss attributable to Cohu	(6,646)	(10,468)	(28,662)	(52,434)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	11,692	(13,276)	12,660	(14,854)
Adjustments related to postretirement benefits	0	35	0	470
Other comprehensive income (loss), net of tax	11,692	(13,241)	12,660	(14,384)
Other comprehensive loss attributable to noncontrolling interest	0	0	0	(4)
Other comprehensive income (loss) attributable to Cohu	11,692	(13,241)	12,660	(14,380)
Comprehensive income (loss)	5,046	(23,567)	(16,002)	(66,756)
Comprehensive income attributable to noncontrolling interest	0	142	0	58
Comprehensive income (loss) attributable to Cohu	$ 5,046	$ (23,709)	$ (16,002)	$ (66,814)