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SELECTED FINANCIAL STATEMENT INFORMATION (Costs and Estimated Earnings on Uncompleted POC Contracts) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Apr. 30, 2017	Oct. 31, 2016
Costs incurred on uncompleted contracts	$ 18,033	$ 19,086
Estimated Earnings	14,262	13,887
Estimated Revenue on Completed Percentage-of-Completion Contracts	32,295	32,973
Billed Contracts Receivable	(35,830)	(39,142)
Billings in Excess of Cost and Estimated Earnings	(3,535)	(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)	2,344	4,839
Accrued expenses and other current liabilities (billings in excess of costs and estimated earnings)	(5,879)	(11,008)
Billings in Excess of Cost and Estimated Earnings	$ (3,535)	$ (6,169)

X

- Definition

Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date, net of costs and estimated earnings in excess of billings for contracts in progress.

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Estimated earnings on uncompleted percentage of completion contracts.

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Total estimated revenue, including billed and unbilled, from completed percentage of completion contracts.

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Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(c))
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Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 35
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=68068069&loc=d3e57788-111642

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Costs incurred and are directly related to generating contract revenues.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings which is expected to be collected within one year or the normal operating cycle, if longer.

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-URI http://asc.fasb.org/extlink&oid=68068069&loc=d3e57795-111642

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