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Leases - Components of lease costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Components of lease costs
Operating lease cost	$ 6,814	$ 5,150
Short term lease cost	840	602
Variable lease cost	653	23
Sublease income	(176)	(91)
Total lease costs, net	$ 8,131	$ 5,684

X

- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

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+ Details

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Period Type:	duration

X

- References

No definition available.

+ Details

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X

- Definition

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.

+ References

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-Publisher FASB
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X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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X

- Definition

Amount of sublease income excluding finance and operating lease expense.

+ References

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-Publisher FASB
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-SubTopic 20
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X

- Definition

Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

+ References

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