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Schedule of Grants of Restricted Shares (Details) shares in Thousands	12 Months Ended
	Jul. 31, 2021 $ / shares shares
Number of Non-vested Shares, Beginning Balance | shares	315
Weighted- Average Grant- Date Fair Value, Beginning balance | $ / shares	$ 10.26
Number of Non-vested Shares, Granted | shares	1
Weighted- Average Grant- Date Fair Value, Granted | $ / shares	$ 11.19
Number of Non-vested Shares, Vested | shares	(152)
Weighted- Average Grant- Date Fair Value, Vested | $ / shares	$ (10.07)
Number of Non-vested Shares, Forfeited | shares	(10)
Weighted- Average Grant- Date Fair Value, Forfeited | $ / shares	$ (11.19)
Number of Non-vested Shares, Ending Balance | shares	154
Weighted- Average Grant- Date Fair Value, Ending balance | $ / shares	$ 10.39
Common Class B [Member]
Number of Non-vested Shares, Beginning Balance | shares	199
Weighted- Average Grant- Date Fair Value, Beginning balance | $ / shares	$ 4.41
Number of Non-vested Shares, Granted | shares	17
Weighted- Average Grant- Date Fair Value, Granted | $ / shares	$ 12.70
Number of Non-vested Shares, Vested | shares	(21)
Weighted- Average Grant- Date Fair Value, Vested | $ / shares	$ (10.47)
Number of Non-vested Shares, Forfeited | shares
Weighted- Average Grant- Date Fair Value, Forfeited | $ / shares
Number of Non-vested Shares, Ending Balance | shares	195
Weighted- Average Grant- Date Fair Value, Ending balance | $ / shares	$ 4.49

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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X

- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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-Publisher FASB
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-SubTopic 10
-Section 50
-Paragraph 2
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X

- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 718
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-Paragraph 2
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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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