Summary of Significant Accounting Policies and Significant Judgments and Estimates - Stock Option Activity (Detail) (USD $)	3 Months Ended
	Dec. 29, 2012	Dec. 24, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Outstanding, Unvested	93,418
Grants, Unvested	1,000
Vested, Unvested	(1,400)
Cancellations/forfeitures, Unvested	(1,257)
Ending balance, Outstanding, Unvested	91,761
Beginning balance, Outstanding, Vested	151,784
Grants, Vested
Vested, Vested	1,400
Cancellations/forfeitures, Vested	(838)
Ending balance, Outstanding, Vested	152,346
Number of Shares, Outstanding, Beginning balance	245,202
Number of Shares, Granted	1,000	3,500
Number of Shares, Vested
Number of Shares, Cancellations/ forfeitures	(2,095)
Number of Shares, Outstanding, Ending balance	244,107
Weighted Average Exercise Price, Outstanding, Beginning balance	$ 9.12
Weighted Average Exercise Price, Granted	$ 5.40
Weighted Average Exercise Price, Vested	$ 8.40
Weighted Average Exercise Price, Cancellations/ forfeitures	$ 11.51
Weighted Average Exercise Price, Outstanding, Ending balance	$ 9.09
Weighted Average Contractual Life, Outstanding, Beginning balance	6 years 11 months 27 days
Weighted Average Contractual Life, Outstanding, Ending balance	6 years 9 months