Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Net sales		$ 144,084	$ 150,011	$ 283,005	$ 297,820
Cost and expenses:
Cost of sales (1)	[1]	83,127	87,605	165,964	180,999
Research and development		20,424	22,108	42,892	44,841
Selling, general and administrative		30,949	36,428	64,301	74,714
Amortization of purchased intangible assets		9,527	9,987	19,065	20,006
Restructuring charges		585	8,545	988	9,906
Impairment charges		0	0	3,949	0
Costs and Expenses, Total		144,612	164,673	297,159	330,466
Loss from operations		(528)	(14,662)	(14,154)	(32,646)
Other (expense) income:
Interest expense		(3,456)	(5,282)	(7,883)	(10,789)
Interest income		21	191	168	413
Foreign transaction loss		(640)	(546)	(1,044)	(328)
Loss from continuing operations before taxes		(4,603)	(20,299)	(22,913)	(43,350)
Income tax provision (benefit)		137	(916)	(855)	(1,116)
Loss from continuing operations		(4,740)	(19,383)	(22,058)	(42,234)
Income from discontinued operations		0	24	42	188
Net loss		(4,740)	(19,359)	(22,016)	(42,046)
Net loss attributable to noncontrolling interest		0	(36)	0	(80)
Net loss attributable to Cohu		$ (4,740)	$ (19,323)	$ (22,016)	$ (41,966)
Basic:
Loss from continuing operations before noncontrolling interest (in dollars per share)		$ (0.11)	$ (0.47)	$ (0.53)	$ (1.03)
Income from discontinued operations (in dollars per share)		0	0.00	0.00	0.01
Net loss attributable to noncontrolling interest (in dollars per share)		0	(0.00)	0	(0.00)
Net loss attributable to Cohu (in dollars per share)		(0.11)	(0.47)	(0.53)	(1.02)
Diluted:
Loss from continuing operations before noncontrolling interest (in dollars per share)		(0.11)	(0.47)	(0.53)	(1.03)
Income from discontinued operations (in dollars per share)		0	0.00	0.00	0.01
Net loss attributable to noncontrolling interest (in dollars per share)		0	(0.00)	0	(0.00)
Net loss attributable to Cohu (in dollars per share)		$ (0.11)	$ (0.47)	$ (0.53)	$ (1.02)
Weighted average shares used in computing loss per share:
Basic (in shares)		41,844	41,125	41,673	40,999
Diluted (in shares)		41,844	41,125	41,673	40,999
Cash dividends declared per share (in dollars per share)		$ 0	$ 0.06	$ 0.06	$ 0.12

[1] Excludes amortization of $7,256 and $7,625 for the three months ended June 27, 2020, and June 29, 2019, respectively, and $14,522 and $15,266 for the six months ended June 27, 2020, and June 29, 2019, respectively.