Business Acquisition (Details) (USD $)	12 Months Ended					0 Months Ended	3 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012	Sep. 24, 2011	Sep. 25, 2010	Apr. 30, 2013 FastPencil	Mar. 29, 2014 FastPencil	Apr. 30, 2013 FastPencil
Business acquisition
Cash paid						$ 5,000,000
Additional potential earn-out payments under acquisition, minimum								0
Additional potential earn-out payments under acquisition, maximum								13,000,000
Potential earn out period						5 years
Fair value of contingent "earn out" consideration								4,700,000
Deferred tax asset, measurement period adjustment amount	43,000	43,000	37,000				97,000
Total						9,700,000
Purchase price allocation
Accounts receivable								3,000
Inventories								42,000
Licensing contract receivable								1,500,000
Amortizable intangibles								2,770,000
Goodwill	16,880,000	21,723,000	15,988,000	16,025,000	57,391,000			5,778,000
Other assets								32,000
Accounts payable and accrued liabilities								(325,000)
Deferred tax liabilities, net								(100,000)
Total								$ 9,700,000