The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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Number of options outstanding, including both vested and non-vested options.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ 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 (g)
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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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Stock Benefit Plans - Schedule of Share Based Compensation Options Outstanding and Exercisable By Price Range (Detail) - $ / shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number of Shares	4,221,579	4,307,248	5,878,441
Options Outstanding, Weighted Average Remaining Contractual Term	4 years 2 months 1 day	2 years 8 months 2 days	2 years 10 months 17 days
Options Outstanding, Weighted Average Exercise Price	$ 6.50	$ 9.78	$ 10.07
$2.70 - $3.59 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	2.70
Weighted Average Exercise Price, Upper	$ 3.59
Options Outstanding, Number of Shares	508,618
Options Outstanding, Weighted Average Remaining Contractual Term	6 years 4 months 13 days
Options Outstanding, Weighted Average Exercise Price	$ 3.48
Options Exercisable, Number of Shares	87,784
Options Exercisable, Weighted Average Exercise Price	$ 3.05
$3.63 - $3.63 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	3.63
Weighted Average Exercise Price, Upper	$ 3.63
Options Outstanding, Number of Shares	1,149,000
Options Outstanding, Weighted Average Remaining Contractual Term	6 years 29 days
Options Outstanding, Weighted Average Exercise Price	$ 3.63
$3.67 - $5.47 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	3.67
Weighted Average Exercise Price, Upper	$ 5.47
Options Outstanding, Number of Shares	422,499
Options Outstanding, Weighted Average Remaining Contractual Term	4 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 4.46
Options Exercisable, Number of Shares	339,320
Options Exercisable, Weighted Average Exercise Price	$ 4.45
$5.50 - $5.94 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	5.50
Weighted Average Exercise Price, Upper	$ 5.94
Options Outstanding, Number of Shares	458,435
Options Outstanding, Weighted Average Remaining Contractual Term	4 years 3 months 26 days
Options Outstanding, Weighted Average Exercise Price	$ 5.82
Options Exercisable, Number of Shares	397,299
Options Exercisable, Weighted Average Exercise Price	$ 5.83
$5.96 - $9.24 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	5.96
Weighted Average Exercise Price, Upper	$ 9.24
Options Outstanding, Number of Shares	425,627
Options Outstanding, Weighted Average Remaining Contractual Term	2 years 6 months 29 days
Options Outstanding, Weighted Average Exercise Price	$ 7.76
Options Exercisable, Number of Shares	411,507
Options Exercisable, Weighted Average Exercise Price	$ 7.77
$9.44 - $9.44 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	9.44
Weighted Average Exercise Price, Upper	$ 9.44
Options Outstanding, Number of Shares	25,000
Options Outstanding, Weighted Average Remaining Contractual Term	3 years 2 months 19 days
Options Outstanding, Weighted Average Exercise Price	$ 9.44
Options Exercisable, Number of Shares	23,437
Options Exercisable, Weighted Average Exercise Price	$ 9.44
$9.55 - $9.55 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	9.55
Weighted Average Exercise Price, Upper	$ 9.55
Options Outstanding, Number of Shares	425,500
Options Outstanding, Weighted Average Remaining Contractual Term	3 years 26 days
Options Outstanding, Weighted Average Exercise Price	$ 9.55
Options Exercisable, Number of Shares	416,621
Options Exercisable, Weighted Average Exercise Price	$ 9.55
$9.64 - $11.26 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	9.64
Weighted Average Exercise Price, Upper	$ 11.26
Options Outstanding, Number of Shares	276,500
Options Outstanding, Weighted Average Remaining Contractual Term	1 year 8 months 16 days
Options Outstanding, Weighted Average Exercise Price	$ 10.25
Options Exercisable, Number of Shares	276,500
Options Exercisable, Weighted Average Exercise Price	$ 10.25
$11.67 - $11.67 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	11.67
Weighted Average Exercise Price, Upper	$ 11.67
Options Outstanding, Number of Shares	423,700
Options Outstanding, Weighted Average Remaining Contractual Term	1 year 1 month 2 days
Options Outstanding, Weighted Average Exercise Price	$ 11.67
Options Exercisable, Number of Shares	423,700
Options Exercisable, Weighted Average Exercise Price	$ 11.67
$12.43 - $15.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	12.43
Weighted Average Exercise Price, Upper	$ 15.60
Options Outstanding, Number of Shares	106,700
Options Outstanding, Weighted Average Remaining Contractual Term	1 year 11 months 23 days
Options Outstanding, Weighted Average Exercise Price	$ 14.82
Options Exercisable, Number of Shares	106,700
Options Exercisable, Weighted Average Exercise Price	$ 14.82
$2.70 - $15.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	2.70
Weighted Average Exercise Price, Upper	$ 15.60
Options Outstanding, Number of Shares	4,221,579
Options Outstanding, Weighted Average Remaining Contractual Term	4 years 2 months 1 day
Options Outstanding, Weighted Average Exercise Price	$ 6.50
Options Exercisable, Number of Shares	2,482,868
Options Exercisable, Weighted Average Exercise Price	$ 8.40