Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 05, 2017	Aug. 30, 2016	Jun. 06, 2017
Deferred Tax Assets, Valuation Allowance	$ 140,400		$ 135,900
Income Tax Expense (Benefit)	51	$ (1,694)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	5,800
Unrecognized Tax Benefits	4,000		3,900
Unrecognized Tax Benefit Reclassified Against Deferred Tax Assets	3,500		3,400
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	2,500		2,500
Operating Loss Carryforwards, State and Local, Reclassified Against Deferred Tax Assets	2,300		2,200
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 500		$ 400