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Credit Losses | 6 Months Ended
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Oct. 31, 2022
Credit Loss [Abstract] |
Credit Losses | Credit LossesThe Company is exposed to credit losses primarily through the services it provides. The Company’s expected credit loss allowance methodology for accounts receivable is developed using historical collection experience, current and future economic and market conditions and a review of the current status of customers' trade accounts receivables. Due to the short-term nature of such receivables, the estimate of the amount of accounts receivable that may not be collected is primarily based on historical loss-rate experience. When required, the Company adjusts the loss-rate methodology to account for current conditions and reasonable and supportable expectations of future economic and market conditions. The Company generally assesses future economic conditions for a period of sixty to ninety days, which corresponds with the contractual life of its accounts receivables. Additionally, specific allowance amounts are established to record the appropriate provision for customers that have a higher probability of default. The Company’s monitoring activities include timely account reconciliation, dispute resolution, payment confirmation, consideration of customers' financial condition and macroeconomic conditions. Balances are written off when determined to be uncollectible. The activity in the allowance for credit losses on the Company's trade receivables is as follows:
| (in thousands)
Balance at April 30, 2022 | $ | 36,384 |
Provision for credit losses | 11,018 |
Write-offs | (5,937) |
Recoveries of amounts previously written off | 621 |
Foreign currency translation | (1,127) |
Balance at October 31, 2022 | $ | 40,959 |
The fair value and unrealized losses on available for sale debt securities, aggregated by investment category and the length of time the security has been in an unrealized loss position, are as follows:
| Less Than 12 Months |  | 12 Months or longer |  | Balance Sheet Classification
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Cash and Cash Equivalent |  | Marketable Securities, Current |  | Marketable Securities, Non- Current
| (in thousands)
Balance at October 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper | $ | 21,302 |  |  | $ | 211 |  |  | $ | 1,847 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 23,149 |  |  | $ | — |
Corporate notes/bonds | $ | 21,771 |  |  | $ | 465 |  |  | $ | 14,925 |  |  | $ | 315 |  |  | $ | — |  |  | $ | 26,761 |  |  | $ | 9,935 |
U.S. Treasury and Agency Securities | $ | 990 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 990 |  |  | $ | — |
Balance at April 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper | $ | 37,002 |  |  | $ | 125 |  |  | $ | 4,499 |  |  | $ | 1 |  |  | $ | 15,489 |  |  | $ | 26,012 |  |  | $ | — |
Corporate notes/bonds | $ | 32,186 |  |  | $ | 446 |  |  | $ | 3,800 |  |  | $ | 4 |  |  | $ | — |  |  | $ | 18,942 |  |  | $ | 17,044 |
U.S. Treasury and Agency Securities | $ | 987 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 987 |  |  | $ | — |
The unrealized losses on 16 and 27 investments in commercial paper securities, 25 and 23 investments in corporate notes/bonds, and 1 and 1 investment in U.S. treasury and agency securities on October 31, 2022 and April 30, 2022, respectively, were caused by fluctuations in market interest rates. The Company only purchases high grade bonds that have a maturity from the date of purchase of no more than two years. The Company monitors the credit worthiness of its investments on a quarterly basis. The Company does not intend to sell the investments and does not believe it will be required to sell the investments before the investments mature and therefore recover the amortized cost basis.

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- Definition The entire disclosure for allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -URI https://asc.fasb.org/topic&trid=2196771 + Details
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- References No definition available. + Details
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