Debt - Schedule of carrying values of all Credit Facilities and Convertible Notes (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Debt
Carrying amount of equity conversion component	$ 14,650
Principal amount	148,685
Unamortized debt costs	(5,072)
Unamortized debt discount	(12,536)
Net carrying amount	131,077
Revolving Credit Facility
Debt
Principal amount	23,685
Net carrying amount	23,685
Term Loan Facility due December 2022
Debt
Principal amount	40,000
Unamortized debt costs	(1,721)
Unamortized debt discount	(269)
Net carrying amount	38,010
3.75% Convertible Senior Notes due 2022
Debt
Carrying amount of equity conversion component	14,650
Principal amount	85,000
Unamortized debt costs	(3,351)
Unamortized debt discount	(12,267)
Net carrying amount	$ 69,382

Represents the carrying amount of the equity conversion component of the debt instrument.

No definition available.

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Namespace Prefix:	aray_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
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+ Details

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Balance Type:	credit
Period Type:	instant

- 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.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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+ Details

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Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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- Details

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- Details

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