Note 15 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Deferred tax assets:
Allowance for doubtful accounts	$ 451	$ 501
Acquisition amortization, net		352
Reserves and accruals	394	393
Other	323	128
Total deferred tax assets	1,168	1,374
Deferred tax liabilities:
Acquisition amortization, net	(100)
Prepaid expense deferral	(750)	(491)
Bonus depreciation to be reversed	(466)	(550)
Canada deferred tax liability, net	(234)	(250)
Total deferred tax liabilities	(1,550)	(1,291)
Total deferred tax liability, net	$ (382)
Total deferred tax asset, net		$ 83