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Account Receivable and Contract Assets (Tables)
3 Months Ended
Jul. 31, 2021
Account Receivable And Contract Assets  
Schedule of Accounts Receivable, Contract Assets and Contract Liabilities

The following provides further details on the balance sheet accounts of accounts receivable and contract assets from contracts with customers:

 

   July 31, 2021   April 30, 2021 
   (in thousands) 
Accounts receivable  $446   $350 
Contract assets   304    190 
Schedule of Significant Changes in Contract assets and Contract Liabilities

Significant changes in the contract assets balances during the period were as follows:

 

   Three months ended 
   July 31, 2021 
    (in thousands) 
Transferred to receivables from contract assets recognized at the beginning of the period  $(190)
Revenue recognized and not billed as of the end of the period   304 
Net change in contract assets  $114