Accounts Receivable

12 Months Ended

Jul. 31, 2015

Accounts Receivable Additional Disclosures [Abstract]

Accounts Receivable

Accounts Receivable

Accounts receivable consist of the following at July 31, 2015 and 2014:

	2015		2014
Billed receivables from commercial customers	$	39,062,000	31,681,000
Billed receivables from the U.S. government and its agencies	8,375,000		10,316,000
Unbilled receivables on contracts-in-progress	23,024,000		13,517,000
Total accounts receivable	70,461,000		55,514,000
Less allowance for doubtful accounts	1,206,000		627,000
Accounts receivable, net	$	69,255,000	54,887,000

Of the unbilled receivables at July 31, 2015 and 2014, approximately $20,256,000 and $9,990,000, respectively, relates to our two large over-the-horizon microwave system contracts with our large U.S. prime contractor customer (the majority of which related to our North African country end-customer). The remaining unbilled receivables include $1,126,000 and $770,000 at July 31, 2015 and 2014, respectively, due from the U.S. government and its agencies. We had virtually no retainage included in unbilled receivables at July 31, 2015 and $120,000 of retainage at July 31, 2014. In the opinion of management, substantially all of the unbilled receivables at July 31, 2015 will be billed and collected within one year.

As of July 31, 2015 and 2014, 36.3% and 18.0%, respectively, of total accounts receivable was due from one large U.S. prime contractor customer (the majority of which related to our North African country end-customer).