Accounts Receivable (Tables)

9 Months Ended

Apr. 30, 2024

Receivables [Abstract]

Accounts receivable

Accounts receivable consist of the following at:

	April 30, 2024		July 31, 2023
Receivables from commercial and international customers	$	39,770,000	52,438,000
Unbilled receivables from commercial and international customers	76,932,000		54,469,000
Receivables from the U.S. government and its agencies	21,316,000		31,149,000
Unbilled receivables from the U.S. government and its agencies	64,334,000		27,192,000
Total accounts receivable	202,352,000		165,248,000
Less allowance for doubtful accounts	2,706,000		2,089,000
Accounts receivable, net	$	199,646,000	163,159,000