Asset Impairment, Restructuring and Other Charges (Details) (USD $)	3 Months Ended					3 Months Ended		12 Months Ended				3 Months Ended
	Sep. 25, 2011	Sep. 26, 2010	Sep. 25, 2011 El Segundo [Member]	Sep. 26, 2010 El Segundo [Member]	Dec. 25, 2011 El Segundo [Member]	Sep. 25, 2011 El Segundo [Member] Severance and Workforce Reduction Costs (Recoveries) [Member]	Sep. 25, 2011 El Segundo [Member] Facility Closing [Member]	Jun. 26, 2011 El Segundo [Member] Severance [Member]	Jun. 27, 2010 El Segundo [Member] Severance [Member]	Jun. 27, 2010 El Segundo [Member] Other Workforce Reduction Costs [Member]	Jun. 27, 2010 El Segundo [Member] Other Charges [Member]	Sep. 25, 2011 Research and Development Facility [Member]	Sep. 26, 2010 Research and Development Facility [Member]
Reported in asset impairment, restructuring and other charges [Abstract]
Severance and workforce reduction costs		$ 67,000		$ 67,000
Other Charges		67,000											67,000
Total asset impairment, restructuring and other charges	0	134,000		67,000									67,000
Reported in cost of sales [Abstract]
Workforce reduction expense related to retention bonuses		100,000
Changes in restructuring related accruals [Roll Forward]
Balance at beginning of period						461,000
Balance at end of period						461,000
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax			12,100,000			5,900,000	6,200,000					9,000,000
Total estimated cost of initiative attributable to non-cash charges			400,000
Total estimated cost of initiative attributable to cash outlay												5,400,000
Total estimated cost of initiative attributable to facilities closure costs relating to equipment			1,000,000
Restructuring costs incurred to date									4,000,000	1,700,000	3,900,000
Recoveries recorded for previously accrued severance costs								3,500,000
Accrued retention bonuses					$ 500,000