Combined contract receivables percentage related to projects.

No definition available.

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- Definition

Specific write offs of aged and uncollectable contract receivables which are fully reserved.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

For unclassified balance sheet, amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(9))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Period Type:	instant

- Details

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- Details

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- Details

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Contract Receivables, net, Contract Receivable Concentrations (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts Receivable, Gross	$ 37,232	$ 41,111
Allowance for doubtful accounts and contract adjustments	$ 2,125	$ 6,792	$ 6,817	$ 7,371
Contract receivables	11.00%	8.00%
Specific write offs of aged and uncollectable contract receivables	$ 4,900
United States [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts Receivable, Gross	25,528	$ 29,027
Allowance for doubtful accounts and contract adjustments	797	5,809
South America [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts Receivable, Gross	11,704	11,659
Allowance for doubtful accounts and contract adjustments	1,328	983
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts Receivable, Gross	0	425
Allowance for doubtful accounts and contract adjustments	$ 0	$ 0