| Accounts receivable |
Accounts receivable consist of the following at: | | | | | | | | | | | | | | | | | | April 30, 2026 | | July 31, 2025 | | Receivables from commercial and international customers | | $ | 57,775,000 | | | 57,713,000 | | | Unbilled receivables from commercial and international customers | | 54,368,000 | | | 69,987,000 | | | Receivables from the U.S. government and its agencies | | 9,418,000 | | | 15,610,000 | | | Unbilled receivables from the U.S. government and its agencies | | 24,325,000 | | | 20,683,000 | | | Total accounts receivable | | 145,886,000 | | | 163,993,000 | | | Less allowance for doubtful accounts | | 18,091,000 | | | 19,156,000 | | | Accounts receivable, net | | $ | 127,795,000 | | | 144,837,000 | |
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