Note 10 - Discontinued Operations - Balance Sheet Information for Fixture Services Business (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Total current assets	$ 4,122	$ 3,741	[1]
Total assets	4,216	3,820
Total current liabilities	596	518	[1]
Xcerra [Member] | Discontinued Operations, Held-for-sale [Member]
Cash and cash equivalents	820	461
Accounts receivable, net	1,816	1,718
Inventories	1,460	1,388
Other current assets	26	174
Total current assets	4,122	3,741
Property, plant and equipment, net	70	66
Other noncurrent assets	24	13
Total assets	4,216	3,820
Other accrued current liabilities	596	518
Total current liabilities	596	518
Noncurrent liabilities
Total liabilities	$ 596	$ 518

[1] Derived from December 29, 2018 audited financial statements