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STOCK BASED COMPENSATION - Options Outstanding by Price Range (Details)	12 Months Ended
	Jun. 30, 2017 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number of options (in shares) | shares	1,621,601
$0.01 - $10.76
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - lower limit (in dollars per share)	$ 0.01
Range of exercise prices - upper limit (in dollars per share)	$ 10.76
Options outstanding - number of options (in shares) | shares	1,397,128
Options outstanding - weighted average remaining contractual life	11 months 5 days
Options outstanding - weighted average exercise price (in dollars per share)	$ 0.26
$10.77 - $14.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - lower limit (in dollars per share)	10.77
Range of exercise prices - upper limit (in dollars per share)	$ 14.99
Options outstanding - number of options (in shares) | shares	214,228
Options outstanding - weighted average remaining contractual life	5 years 4 months 17 days
Options outstanding - weighted average exercise price (in dollars per share)	$ 10.90
$15.00 - $16.75
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - lower limit (in dollars per share)	15.00
Range of exercise prices - upper limit (in dollars per share)	$ 16.75
Options outstanding - number of options (in shares) | shares	4,645
Options outstanding - weighted average remaining contractual life	4 years 10 months 2 days
Options outstanding - weighted average exercise price (in dollars per share)	$ 15.02
$16.76 - $18.70
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - lower limit (in dollars per share)	16.76
Range of exercise prices - upper limit (in dollars per share)	$ 18.70
Options outstanding - number of options (in shares) | shares	4,350
Options outstanding - weighted average remaining contractual life	5 years 4 months 17 days
Options outstanding - weighted average exercise price (in dollars per share)	$ 17.46
$18.71 - $19.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices - lower limit (in dollars per share)	18.71
Range of exercise prices - upper limit (in dollars per share)	$ 19.99
Options outstanding - number of options (in shares) | shares	1,250
Options outstanding - weighted average remaining contractual life	4 years 4 months 17 days
Options outstanding - weighted average exercise price (in dollars per share)	$ 19.22

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- Definition

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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- 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 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 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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- 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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