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Accounts Receivable, Unbilled Services and Deferred Revenue (Tables)
 6 Months Ended
Oct. 31, 2022
Receivables [Abstract]  
Summary of accounts receivable, unbilled services, and advanced billings Accounts receivable and unbilled services were as follows (in thousands)
October 31, 2022April 30, 2022
Accounts receivable$5,392 $6,037 
Unbilled services4,316 4,106 
Total accounts receivable and unbilled services9,708 10,143 
Less allowance for doubtful accounts(760)(630)
Total accounts receivable, net$8,948 $9,513 
Summary of advanced billings Deferred revenue was as follows (in thousands):
October 31, 2022April 30, 2022
Deferred revenue$11,185 $11,071