Note 10 - Stock Ownership Plans - Summary of Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 29, 2019 USD ($) $ / shares shares
Outstanding, Shares (in shares) | shares	809
Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 1.82
Exercised, Shares (in shares) | shares
Exercised, Weighted Average Exercise Price (in dollars per share) | $ / shares
Cancelled, Shares (in shares) | shares
Cancelled, Weighted Average Exercise Price (in dollars per share) | $ / shares
Outstanding, Shares (in shares) | shares	809
Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 1.82
Outstanding, Weighted Average Remaining Contractual Term (Year)	1 year 219 days
Outstanding, Aggregate Intrinsic Value | $	$ 120
Exercisable, Shares (in shares) | shares	809
Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 1.82
Exercisable, Weighted Average Remaining Contractual Term (Year)	1 year 219 days
Exercisable, Aggregate Intrinsic Value | $	$ 120