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Note 10 - Stock Ownership Plans - Summary of Stock Option Activity (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
 9 Months Ended
Jun. 27, 2021
USD ($)
$ / shares
shares
Outstanding, Shares (in shares) | shares 41
Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares $ 11.40
Exercised, Shares (in shares) | shares (2)
Exercised, Weighted Average Exercise Price (in dollars per share) | $ / shares $ 11.30
Cancelled, Shares (in shares) | shares (3)
Cancelled, Weighted Average Exercise Price (in dollars per share) | $ / shares $ 11.30
Outstanding, Shares (in shares) | shares 36
Outstanding, Weighted Average Exercise Price (in dollars per share) | $ / shares $ 11.40
Outstanding, Weighted Average Remaining Contractual Term (Year) 11 months 12 days
Outstanding, Aggregate Intrinsic Value | $ $ 604
Exercisable, Shares (in shares) | shares 36
Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares $ 11.40
Exercisable, Weighted Average Remaining Contractual Term (Year) 11 months 12 days
Exercisable, Aggregate Intrinsic Value | $ $ 604