SELECTED FINANCIAL STATEMENT INFORMATION (Costs and Estimated Earnings on Uncompleted POC Contracts) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jul. 31, 2017	Oct. 31, 2016
Costs incurred on uncompleted contracts	$ 24,114	$ 19,086
Estimated Earnings	17,463	13,887
Estimated Revenue on Completed Percentage-of-Completion Contracts	41,577	32,973
Billed Contracts Receivable	(43,652)	(39,142)
Billings in Excess of Cost and Estimated Earnings	(2,075)	(6,169)
Included in the accompanying Condensed Consolidated Balance Sheets under the following captions:
Accounts receivable, net (costs and estimated earnings in excess of billings)	3,730	4,839
Accrued expenses and other current liabilities (billings in excess of costs and estimated earnings)	(5,805)	(11,008)
Billings in Excess of Cost and Estimated Earnings	$ (2,075)	$ (6,169)