Calculation of earnings per share and weighted average shares outstanding (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Basic and fully diluted earnings per share [Abstract]
Net income (loss)	$ 124	$ 156	$ (1,116)	$ 910
Weighted average shares outstanding - basic (in shares)	3,365	3,341	3,356	3,330
Basic income (loss) per share (in dollars per share)	$ 0.04	$ 0.05	$ (0.33)	$ 0.27
Common stock equivalents (in shares)	6	69	4	51
Weighted average shares outstanding - diluted (in shares)	3,371	3,410	3,360	3,381
Diluted income (loss) per share (in dollars per share)	$ 0.04	$ 0.05	$ (0.33)	$ 0.27
No. of options that are anti-dilutive excluded from calculation of common stock equivalents (in shares)	5	36	0	36