Note 5 - Share-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 25, 2016	Jun. 27, 2015	Jun. 25, 2016	Jun. 27, 2015
Employee Stock Option [Member]
Share-based compensation expense	$ 112	$ 439	$ 56	$ 987
Stock Purchase Plan [Member]
Share-based compensation expense	96	77	248	274
Restricted Stock [Member]
Share-based compensation expense	1	1	3	4
Share-based compensation expense	209	517	307	1,265
The above compensation is net of tax benefits	$ 470	$ 99	$ 1,427	$ 360