Stock Options by Range of Exercise Prices (Detail) (USD $)	9 Months Ended
Mar. 31, 2015
Employee 2012 Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number outstanding	112,500
Options Outstanding, Weighted average remaining contractual life	9 years
Options Outstanding, weighted average exercise price	$ 5.30
Options exercisable, Number exercisable	27,500
Options exercisable, Weighted average exercise price	$ 5.26
Employee 2012 Stock Option Plan [Member] \| Exercise price range $ 4.88 - $ 6.31 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 4.88
Range of exercise prices, upper limit	$ 6.31
Options Outstanding, Number outstanding	112,500
Options Outstanding, Weighted average remaining contractual life	9 years
Options Outstanding, weighted average exercise price	$ 5.30
Options exercisable, Number exercisable	27,500
Options exercisable, Weighted average exercise price	$ 5.26
NonEmployee 2012 Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 4.37
Range of exercise prices, upper limit	$ 4.88
Options Outstanding, Number outstanding	35,000
Options Outstanding, Weighted average remaining contractual life	8 years 9 months 18 days
Options Outstanding, weighted average exercise price	$ 4.73
Options exercisable, Number exercisable	12,000
Options exercisable, Weighted average exercise price	$ 4.80
2002 Employee Stock Option Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number outstanding	264,750
Options Outstanding, Weighted average remaining contractual life	1 year 3 months 18 days
Options Outstanding, weighted average exercise price	$ 6.51
2002 Employee Stock Option Plan [Member] \| Exercise price range $ 5.22 - $ 6.62 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 5.22
Range of exercise prices, upper limit	$ 6.62
Options Outstanding, Number outstanding	227,250
Options Outstanding, Weighted average remaining contractual life	1 year 4 months 24 days
Options Outstanding, weighted average exercise price	$ 5.75
2002 Employee Stock Option Plan [Member] \| Exercise price range $11.16 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 11.16
Options Outstanding, Number outstanding	37,500
Options Outstanding, Weighted average remaining contractual life	1 year
Options Outstanding, weighted average exercise price	$ 11.16

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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=6415400&loc=d3e5070-113901

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- Definition

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)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ 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 (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ 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 (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ 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 (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term of outstanding stock options, 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

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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