Note 5 - Stock-based Compensation - Summary of Stock Option Activity (Details)	3 Months Ended
	Dec. 26, 2023 $ / shares shares
Outstanding at beginning of year, shares (in shares) | shares	437,528
Outstanding at beginning of year, weighted average exercise price (in dollars per share) | $ / shares	$ 3.95
Options granted, shares (in shares) | shares	38,000
Options granted, weighted average exercise price (in dollars per share) | $ / shares	$ 2.51
Outstanding, shares (in shares) | shares	475,528
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 3.83
Outstanding, weighted average remaining contractual life (Year)	4 years 9 months 18 days
Exercisable, shares (in shares) | shares	341,528
Exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 3.7
Exercisable, weighted average remaining contractual life (Year)	4 years