Accounts Receivable

3 Months Ended

Oct. 31, 2015

Accounts Receivable Additional Disclosures [Abstract]

Accounts receivable consist of the following at:



	October 31, 2015		July 31, 2015
Billed receivables from commercial customers	$	29,977,000	39,062,000
Billed receivables from the U.S. government and its agencies	11,645,000		8,375,000
Unbilled receivables on contracts-in-progress	19,564,000		23,024,000
Total accounts receivable	61,186,000		70,461,000
Less allowance for doubtful accounts	1,836,000		1,206,000
Accounts receivable, net	$	59,350,000	69,255,000

Of the unbilled receivables at October 31, 2015 and July 31, 2015, $16,820,000 and $20,256,000, respectively, relates to our two large over-the-horizon microwave system contracts with our large U.S. prime contractor customer (all of which related to our North African country end-customer). The remaining unbilled receivables include $814,000 and $1,126,000 at October 31, 2015 and July 31, 2015, respectively, due from the U.S. government and its agencies. We had virtually no retainage included in unbilled receivables at both October 31, 2015 and July 31, 2015. In the opinion of management, substantially all of the unbilled receivables at October 31, 2015 will be billed and collected within one year.

As of October 31, 2015 and July 31, 2015, 33.8% and 36.3%, 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).