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Commitments and Contingencies (Tables)
3 Months Ended
Jul. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Future Operating Lease Payments
Future minimum lease payments due each fiscal year as follows (in thousands):
2020 (remaining)
$
1,041

2021
1,471

2022
1,445

2023
1,404

2024
1,419

Thereafter
4,400

 Total
$
11,180