Defined Benefit Pension Obligation - Plan Assets (Details) - Defined benefit pension plan - BVG	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Plan Assets
Plan assets expected investment percentage	100.00%
Required capital percentage	100.00%
Guaranteed interest rate for mandatory retirement savings (as a percent)		1.25%
Guaranteed interest rate for supplementary retirement savings (as a percent)		0.75%

Percentage of guaranteed interest rate for mandatory retirement savings under plan assets arrangement embedded in defined benefit plan.

No definition available.

+ Details

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- Definition

Percentage of guaranteed interest rate for supplementary retirement savings under plan assets arrangement embedded in defined benefit plan.

+ References

No definition available.

+ Details

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- Definition

The required percentage of capital to be provided to the entity under the plan assets arrangement embedded in the defined benefit plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	aray_
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- References

No definition available.

+ Details

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- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

+ Details

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- Details

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- Details

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