Accounts Receivable

12 Months Ended

Jul. 31, 2022

Receivables [Abstract]

Accounts Receivable

Accounts Receivable

Accounts receivable consists of the following at July 31, 2022 and 2021:

	2022		2021
Receivables from commercial and international customers	$	59,922,000	86,890,000
Unbilled receivables from commercial and international customers	39,826,000		36,131,000
Receivables from the U.S. government and its agencies	24,776,000		33,381,000
Unbilled receivables from the U.S. government and its agencies	1,524,000		3,356,000
Total accounts receivable	126,048,000		159,758,000
Less allowance for doubtful accounts	2,337,000		1,648,000
Accounts receivable, net	$	123,711,000	158,110,000

Unbilled receivables as of July 31, 2022 relate to contracts-in-progress for which revenue has been recognized, but for which we have not yet earned the right to bill the customer for work performed to-date. Under ASC 606, unbilled receivables constitute contract assets. Management estimates that a substantial portion of the amounts not yet billed at July 31, 2022 will be billed and collected within one year.

As of July 31, 2022, 20.9% and 13.4% of total accounts receivable related to U.S. government (and its agencies) and Verizon, respectively.

As of July 31, 2021, 23.0%, 12.7% and 12.1% of total accounts receivable related to the U.S. government (and its agencies), AT&T, Inc. and Verizon, respectively.