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Accounts Receivable, Unbilled Services and Deferred Revenue
 9 Months Ended
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, 2022April 30, 2021
Accounts receivable$4,858 $4,304 
Unbilled services4,160 3,020 
Total accounts receivable and unbilled services9,018 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, 2022April 30, 2021
Deferred revenue$8,701 $6,256 
Deferred revenue is shown as a current liability on the Company's condensed consolidated balance sheets.