Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Net income (loss)	$ (69,692)	$ (32,424)	$ 32,843
Net income (loss) attributable to noncontrolling interest	8	(243)
Net income (loss) attributable to Cohu	(69,700)	(32,181)	32,843
Foreign currency translation adjustments, net of tax	(7,522)	(8,905)	11,345
Adjustments related to postretirement benefits	(628)	805	(1,248)
Change in unrealized gain/loss on investments, net of tax		7	(2)
Other comprehensive income (loss), net of tax	(8,150)	(8,093)	10,095
Other comprehensive income (loss) attributable to noncontrolling interest	(4)	(5)
Other comprehensive income (loss) attributable to Cohu	(8,146)	(8,088)	10,095
Comprehensive income (loss)	(77,842)	(40,517)	42,938
Comprehensive income (loss) attributable to noncontrolling interest	4	(248)
Comprehensive income (loss) attributable to Cohu	$ (77,846)	$ (40,269)	$ 42,938