Note 8 - Earnings Per Share of Common Stock - Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Numerator for basic and diluted earnings per share:
Net income	$ 962,892	$ 1,142,752
Denominator for basic earnings per share:
Weighted average shares (in shares)	2,755,625	2,726,127
Effect of dilutive securities:
Employee stock options (in shares)	14,921	25,743
Weighted average shares outstanding:
Adjusted weighted average shares and assumed conversions (in shares)	2,770,546	2,751,870
Net income per share:
Basic (in dollars per share)	$ 0.35	$ 0.42
Diluted (in dollars per share)	$ 0.35	$ 0.42