Note 12 - Discontinued Operations - Balance Sheet Information for Fixture Services Business (Details) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Cash	$ 461
Total current assets	3,741
Discontinued operations	3,820
Total current liabilities	518
Xcerra [Member] | Discontinued Operations, Held-for-sale [Member]
Cash	461
Accounts receivable, net	1,718
Inventories	1,388
Other current assets	174
Total current assets	3,741
Property, plant and equipment, net	66
Other noncurrent assets	13
Discontinued operations	3,820
Other accrued current liabilities	518
Total current liabilities	518
Total liabilities	$ 518