Basis of Presentation (Details) (USD $)	3 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Oct. 01, 2011
Basis of Presentation [Abstract]
Maximum number of months for manufacturing and delivery that divides short and long term contracts for revenue recognition (in months)	6
Inventory disclosure [Abstract]
Customer projects in various stages of completion	$ 19,993,000		$ 19,026,000
Components, assemblies and parts	47,194,000		46,961,000
Total	67,187,000		65,987,000
Amortization [Abstract]
Amortization expense	700,000	800,000
Warranty obligations [Abstract]
Life of warranty obligations, minimum (in months)	12
Life of warranty obligations for sales, maximum (in months)	24
Number of previous months historical warranty claims used to calculate warranty expense percentage (in months)	12
Warranty provisions and claims [Roll Forward]
Beginning balance	5,290,000	7,505,000
Warranty provisions	(389,000)	513,000
Warranty claims	(1,018,000)	(1,448,000)
Adjustments to preexisting warranties	0	239,000
Currency translation	(66,000)	(74,000)
Ending balance	4,595,000	6,735,000
Software development costs [Member]
Amortization [Abstract]
Amortization expense	$ 500,000	$ 400,000