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Accounts Receivable, Unbilled Services and Deferred Revenue | 9 Months Ended
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Jan. 31, 2022
Receivables [Abstract] |
Accounts Receivable, Unbilled Services and Deferred Revenue | Accounts Receivable, Unbilled Services and Deferred Revenue Accounts receivable and unbilled services were as follows (in thousands):
| January 31, 2022 |  | April 30, 2021
Accounts receivable | $ | 4,858 |  |  | $ | 4,304 |
Unbilled services | 4,160 |  |  | 3,020 |
Total accounts receivable and unbilled services | 9,018 |  |  | 7,324 |
Less allowance for doubtful accounts | (455) |  |  | (338) |
Total accounts receivable, net | $ | 8,563 |  |  | $ | 6,986 |
Deferred revenue was as follows (in thousands):
| January 31, 2022 |  | April 30, 2021
Deferred revenue | $ | 8,701 |  |  | $ | 6,256 |
Deferred revenue is shown as a current liability on the Company's condensed consolidated balance sheets.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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