Note 15 - Income Taxes - Income Tax Provision Reconciliation (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017
Federal statutory rate	35.00%	21.00%	34.00%
Tax expense (benefit) on taxable (loss) income at federal statutory rate		$ 821	$ (83)
State and Puerto Rico income taxes, net of Federal income tax benefit		91	(248)
United States 179D and Canadian R&D tax credits		(341)	(603)
Permanent differences		49	458
Worthless stock deduction			(2,861)
Foreign income tax rates		(173)	(92)
Impact on net deferred tax assets from changes in federal tax rate in 2017			1,015
2018 adjustments to NOL and repatriation taxes		730	198
Other		16	(39)
Total income tax (benefit) expense		$ 1,193	$ (2,255)

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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