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Accounts Receivable (Tables)

6 Months Ended

Jan. 31, 2017

Accounts Receivable Additional Disclosures [Abstract]

Accounts receivable

Accounts receivable consist of the following at:

		January 31, 2017				July 31, 2016
Billed receivables from commercial and international customers		$	73,002,000			90,185,000
Unbilled receivables from commercial and international customers		23,405,000				19,333,000
Billed receivables from the U.S. government and its agencies		16,958,000				21,465,000
Unbilled receivables from the U.S. government and its agencies		13,642,000				21,013,000
Total accounts receivable		127,007,000				151,996,000
Less allowance for doubtful accounts		1,462,000				1,029,000
Accounts receivable, net		$	125,545,000			150,967,000

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- References

No definition available.

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- Definition

Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ 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 210.5-02.3,4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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