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Accrued Expenses (Tables)
3 Months Ended
Jul. 31, 2022
Payables and Accruals [Abstract]  
Schedule of Accrued Expenses

Accrued expenses consisted of the following at July 31, 2022 and April 30, 2022:

 

   July 31, 2022   April 30, 2022 
   (in thousands)     
Project costs  $100   $59 
Contract loss reserve   435    328 
Employee incentive payments   355    266 
Accrued salary and benefits   31    60 
Legal and accounting fees   24    30 
Other   145    134 
Accrued expenses total  $1,090   $877