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Leases (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Apr. 30, 2020 USD ($)	Apr. 30, 2020 USD ($)
Leases [Abstract]
Operating lease cost	$ 707	$ 2,130
Short-term lease cost	66	198
Total lease cost	773	2,328
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 687	$ 2,056
Weighted-average remaining lease term-operating leases	4 years 4 months 24 days	4 years 4 months 24 days
Weighted-average discount rate-operating leases	3.12%	3.12%

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Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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