Accrued Liabilities (Details) (USD $)	3 Months Ended
	Jan. 31, 2015		Oct. 31, 2014
Accrued Liabilities, Current [Abstract]
Accrued payroll and employee benefits	$ 3,453,000		$ 4,432,000
Accrued contract and operating costs	34,000		34,000
Reserve for product warranty costs	1,361,000	[1]	1,156,000	[1]
Reserve for service agreement costs	4,293,000		3,882,000
Accrued taxes, legal, professional and other	2,638,000		2,562,000
Accrued Liabilities, Current	11,779,000		12,066,000
Product Warranty Accrual, Warranties Issued	500,000
Product Warranty Accrual, Payment and Adjustments	$ 300,000

[1] Activity in the accrued product warranty costs for the three months ended January 31, 2015 included additions for estimates of potential future warranty obligations of $0.5 million on contracts in the warranty period and reductions related to actual warranty spend of $0.3 million as contracts progress through the warranty period or are beyond the warranty period.