Note 2 - Discontinued Operations (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Broadcast Microwave Services, Inc. (“BMS”) [Member]
Proceeds from Divestiture of Businesses	$ 4,881
Disposal Group, Including Discontinued Operation, Contingent Consideration	2,500
Contingent Consideration Receivable, Fair Value	$ 500
Cohu Electronics [Member]
Proceeds from Divestiture of Businesses		$ 10,258
Disposal Group, Including Discontinued Operation, Contingent Consideration		500
Initial Cash Proceeds from Divestiture of Businesses		$ 9,500