Calculation of earnings per share and weighted average shares outstanding (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jan. 03, 2015	Dec. 28, 2013
Numerator:
Net income attributable to common stockholders for computing net income per ordinary share - basic	$ 171	$ 488
Dividend eliminated upon assumed conversion of convertible preference shares	111	0
Net income attributable to common stockholders for computing net income per ordinary share - diluted	$ 171	$ 488
Denominator :
Weighted average shares used in calculating net income per ordinary share - basic (in shares)	3,427,000	3,375,000
Adjustment for assumed conversion of convertible preference shares (in shares)	0	0
Adjustment for shares issuable upon vesting of restricted stock (in shares)	86,000	36,000
Weighted average shares used in calculating net income per ordinary share - diluted (in shares)	3,513,000	3,411,000
Net income per ordinary share - basic (in dollars per share)	$ 0.05	$ 0.14
Net income per ordinary share - diluted (in dollars per share)	$ 0.05	$ 0.14
Number of shares of convertible preference stock that are anti-dilutive excluded from calculation of common stock equivalents (in shares)	1,382	0