Note 15 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Deferred tax assets:
Allowance for doubtful accounts	$ 235	$ 451
Federal and state net operating loss carryforward	2,501
Reserves and accruals	435	394
Other	53	323
Total deferred tax assets	3,224	1,168
Deferred tax liabilities:
Acquisition amortization, net	(206)	(100)
Prepaid expense deferral	(503)	(750)
Bonus depreciation to be reversed	(326)	(466)
Canada deferred tax liability, net	(431)	(234)
Total deferred tax liabilities	(1,466)	(1,550)
Total deferred tax liability, net	$ 1,758
Total deferred tax asset, net		$ (382)