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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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
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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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)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Shareholders' Equity - Number of Stock Options Outstanding and Exercisable (Detail) - $ / shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.80	$ 2.07	$ 2.46	$ 2.71	$ 1.92
Number Outstanding	680,142	635,642	590,142	548,999	617,499
Weighted-Average Remaining Contractual Life (in years)	5 years 8 months 26 days
Number Exercisable	620,142	530,642	470,142
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 0.71
Number Outstanding	18,000
Weighted-Average Remaining Contractual Life (in years)	6 years 2 months 19 days
Number Exercisable	18,000
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.21
Number Outstanding	72,000
Weighted-Average Remaining Contractual Life (in years)	9 years 2 months 16 days
Number Exercisable	72,000
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.22
Number Outstanding	210,000
Weighted-Average Remaining Contractual Life (in years)	5 years 2 months 5 days
Number Exercisable	210,000
Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.49
Number Outstanding	90,000
Weighted-Average Remaining Contractual Life (in years)	7 years 2 months 8 days
Number Exercisable	60,000
Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.67
Number Outstanding	60,000
Weighted-Average Remaining Contractual Life (in years)	4 years 4 months 13 days
Number Exercisable	60,000
Range Six [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 1.79
Number Outstanding	75,000
Weighted-Average Remaining Contractual Life (in years)	8 years 2 months 12 days
Number Exercisable	45,000
Range Seven [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 2.09
Number Outstanding	120,000
Weighted-Average Remaining Contractual Life (in years)	4 years 2 months 12 days
Number Exercisable	120,000
Range Eight [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 2.51
Number Outstanding	6,000
Weighted-Average Remaining Contractual Life (in years)	1 year 2 months 23 days
Number Exercisable	6,000
Range Nine [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices	$ 8.00
Number Outstanding	29,142
Weighted-Average Remaining Contractual Life (in years)	2 months 23 days
Number Exercisable	29,142