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

Accrued expenses consisted of the following at January 31, 2022 and April 30, 2021:

 

   January 31, 2022   April 30, 2021 
   (in thousands)   (in thousands) 
Project costs  $102   $368 
Contract loss reserve   328    328 
Employee incentive payments   191    283 
Accrued salary and benefits   409    631 
Professional fees   96    200 
Other   166    71 
Accrued expenses total   $1,292   $1,881