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Leases (Tables)
 3 Months Ended
Oct. 31, 2020
Disclosure Text Block [Abstract]  
Schedule of supplemental disclosures related to the Company's operating leases
   Three Months Ended
October 31,		 
   2020   2019 
   (in thousands) 
Operating lease cost  $729   $711 
Short-term lease cost   65    58 
Total lease cost  $794   $769 
Cash paid for amounts included in the measurement of lease liabilities:          
Operating cash flows from operating leases  $710   $684 

 
Schedule of supplemental disclosures related weighted average operating leases
   October 31,
2020		   July 31,
2020		 
Weighted-average remaining lease term-operating leases   3.9 years    4.2 years 
Weighted-average discount rate-operating leases   2.9%   3.12%

 
Schedule of aggregate operating lease liability
   October 31,
2020		   July 31,
2020		 
   (in thousands) 
Operating lease liabilities included in “Other current liabilities”  $2,477   $2,350 
Operating lease liabilities included in noncurrent liabilities   7,193    7,353 
Total  $9,670   $9,703 

 
Schedule of future minimum maturities of operating lease liabilities
Twelve-month period ending October 31:    
2021  $2,784 
2022   2,579 
2023   2,122 
2024   1,835 
2025   960 
Thereafter   
—
 
Total lease payments   10,280 
Less imputed interest   (610)
Total operating lease liabilities  $9,670