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Accounts Receivable | 6 Months Ended
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Jan. 31, 2014
Accounts Receivable Additional Disclosures [Abstract] |
Accounts Receivable | (6) Accounts Receivable Accounts receivable consist of the following at:
|  | January 31, 2014 |  | July 31, 2013
Billed receivables from commercial customers |  | $ | 36,018,000 |  |  | 40,005,000 |
Billed receivables from the U.S. government and its agencies |  | 8,757,000 |  |  | 8,114,000 |
Unbilled receivables on contracts-in-progress |  | 12,799,000 |  |  | 2,399,000 |
Total accounts receivable |  | 57,574,000 |  |  | 50,518,000 |
Less allowance for doubtful accounts |  | 695,000 |  |  | 603,000 |
Accounts receivable, net |  | $ | 56,879,000 |  |  | 49,915,000 |
Unbilled receivables on contracts-in-progress include $1,334,000 and $699,000 at January 31, 2014 and July 31, 2013, respectively, due from the U.S. government and its agencies. We had virtually no retainage included in unbilled receivables at both January 31, 2014 and July 31, 2013. In the opinion of management, a substantial portion of the unbilled balances will be billed and collected within one year. As of January 31, 2014, one customer, which is also the prime contractor that we perform work for on our two North African country end-customer over-the-horizon microwave system contracts, accounts for 17.9% of total accounts receivable.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3, 4 -Article 5 Reference 3: 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=7512638&loc=d3e5074-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5066-111524 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 9 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Article 4 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5162-111524 + Details
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