Note 10 - Discontinued Operations - Balance Sheet Information for Fixture Services Business (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019
Total current assets		$ 3,503	[1]
Discontinued operations		3,618
Total current liabilities		599	[1]
Noncurrent liabilities		24	[1]
Fixtures Services Business FSG [Member] | Discontinued Operations, Held-for-sale [Member]
Cash and cash equivalents		736
Accounts receivable, net		1,316
Inventories		1,411
Other current assets		40
Total current assets		3,503
Property, plant and equipment, net		33
Other noncurrent assets		82
Discontinued operations		3,618
Other accrued current liabilities		599
Total current liabilities		599
Noncurrent liabilities		24
Total liabilities		$ 623

[1] Derived from December 28, 2019 audited financial statements