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Leases - Supplemental Balance Sheet Information Related to Leases (Details)
$ in Thousands
Jul. 31, 2020
USD ($)
Assets  
Operating lease ROU assets $ 2,174
Liabilities and Stockholders' Equity  
Current operating lease liabilities 600
Non-current operating lease liabilities 1,637
Total operating lease liabilities $ 2,237
Weighted-average remaining lease term (in years) 10 years 9 months 18 days
Weighted-average discount rate 3.80%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:OtherAssets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:AccruedLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent