Note 10 (Details Textual)	3 Months Ended		6 Months Ended
	Mar. 25, 2017 USD ($)	Mar. 26, 2016 USD ($)	Mar. 25, 2017 USD ($)	Mar. 26, 2016 USD ($)
Number of Reportable Segments			3
Indefinite-lived Intangible Assets Acquired				$ 0
Amortization of Intangible Assets	$ 1,021,000	$ 1,328,000	$ 2,129,000	2,657,000
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	3,900,000		3,900,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3,500,000		3,500,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	3,400,000		3,400,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	3,200,000		3,200,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2,500,000		$ 2,500,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			10 years 219 days
Goodwill, Acquired During Period				$ 0
Hill & Valley Inc. [Member]
Indefinite-lived Intangible Assets Acquired	16,820,000		$ 16,820,000
Goodwill, Acquired During Period	13,533,360	$ 0	$ 13,533,360
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life			3 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life			20 years
Trade Names [Member]
Finite-Lived Intangible Assets, Gross	$ 649,000		$ 649,000
Finite-Lived Intangible Asset, Useful Life			5 years