Stock Based Compensation Plans (Summary of non-vested stock options) (Detail) - Stock Option shares in Thousands	12 Months Ended
Jun. 30, 2017 $ / shares shares
Shares subject to option
Shares subject to option, Non-vested at June 30, 2016 \| shares
Shares subject to option, Granted \| shares	28
Shares subject to option, Vested \| shares
Shares subject to option, Forfeited \| shares
Shares subject to option, Non-vested at June 30, 2017 \| shares	28
Weighted average grant date fair value
Weighted average grant date fair value, Non-vested at June 30, 2016 \| $ / shares
Weighted average grant date fair value, Granted \| $ / shares	5.44
Weighted average grant date fair value, Vested \| $ / shares
Weighted average grant date fair value, Forfeited \| $ / shares
Weighted average grant date fair value, Non-vested at June 30, 2017 \| $ / shares	$ 5.44

Gross number of share options (or share units) granted during the period.

No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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- Definition

Number of non-vested options outstanding.

+ References

No definition available.

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Number of non-vested options forfeited.

+ References

No definition available.

+ Details

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- Definition

Weighted average grant-date fair value of non-vested options forfeited.

+ References

No definition available.

+ Details

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- Definition

Weighted average grant-date fair value of non-vested options outstanding.

+ References

No definition available.

+ Details

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- References

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- Definition

Number of options vested.

+ References

No definition available.

+ Details

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- Definition

Weighted average grant-date fair value of options vested.

+ References

No definition available.

+ Details

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Stock Based Compensation Plans (Summary of non-vested stock options) (Detail) - Stock Option shares in Thousands	12 Months Ended
	Jun. 30, 2017 $ / shares shares
Shares subject to option
Shares subject to option, Non-vested at June 30, 2016 \| shares
Shares subject to option, Granted \| shares	28
Shares subject to option, Vested \| shares
Shares subject to option, Forfeited \| shares
Shares subject to option, Non-vested at June 30, 2017 \| shares	28
Weighted average grant date fair value
Weighted average grant date fair value, Non-vested at June 30, 2016 \| $ / shares
Weighted average grant date fair value, Granted \| $ / shares	5.44
Weighted average grant date fair value, Vested \| $ / shares
Weighted average grant date fair value, Forfeited \| $ / shares
Weighted average grant date fair value, Non-vested at June 30, 2017 \| $ / shares	$ 5.44