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Accounts Receivable, Unbilled Services and Deferred Revenue
 3 Months Ended
Jul. 31, 2021
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):
July 31, 2021April 30, 2021
Accounts receivable$4,465 $4,304 
Unbilled services3,684 3,020 
Total accounts receivable and unbilled services8,149 7,324 
Less allowance for doubtful accounts(416)(338)
Total accounts receivable, net$7,733 $6,986 
Deferred revenue was as follows (in thousands):
July 31, 2021April 30, 2021
Deferred revenue$5,481 $6,256 
Deferred revenue is shown as a current liability on the Company's condensed consolidated balance sheets.