No definition available.

Name:	aray_DebtAgreementAmendmentDate
Namespace Prefix:	aray_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt conversion, number of shares issued for exchange premium and equity value in excess of original conversion price.

+ References

No definition available.

+ Details

Name:	aray_DebtConversionNumberOfSharesIssuedForExchangePremiumAndEquityValueInExcessOfOriginalConversionPrice
Namespace Prefix:	aray_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of additional term loan to be borrowed as per agreement .

+ References

No definition available.

+ Details

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

- Definition

The percentage of annual administrative fee payable on loan facility.

+ References

No definition available.

+ Details

Name:	aray_DebtInstrumentAnnualAdministrativeFeePayableAsPercentage
Namespace Prefix:	aray_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of the fee that accompanies borrowing money under the debt instrument.

+ References

No definition available.

+ Details

Name:	aray_DebtInstrumentFinalFeePercentage
Namespace Prefix:	aray_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of term loan to be borrowed as per agreement initially.

+ References

No definition available.

+ Details

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

- Definition

Period of time for interest payment from the date of issuance, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	aray_DebtInstrumentMaximumTermForInterestPayment
Namespace Prefix:	aray_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the prepayment amount , for the term loan facility of first year..

+ References

No definition available.

+ Details

Name:	aray_DebtInstrumentPrepaymentFeesFirstYearPercentage
Namespace Prefix:	aray_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the prepayment amount , for the term loan facility of second year..

+ References

No definition available.

+ Details

Name:	aray_DebtInstrumentPrepaymentFeesSecondYearPercentage
Namespace Prefix:	aray_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the prepayment amount , for the term loan facility of third year..

+ References

No definition available.

+ Details

Name:	aray_DebtInstrumentPrepaymentFeesThirdYearPercentage
Namespace Prefix:	aray_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the principal amount of notes used as denominator for purposes of computing the conversion ratio of convertible debt.

+ References

No definition available.

+ Details

Name:	aray_DebtInstrumentPrincipalAmountDenominationForConversionIntoCommonStock
Namespace Prefix:	aray_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the price at which the debt may be repurchased, as a percentage of the principal amount in the event of a "fundamental change," as defined in the Indenture.

+ References

No definition available.

+ Details

Name:	aray_DebtInstrumentRepurchasePriceDueToFundamentalChange
Namespace Prefix:	aray_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fixed charge coverage ratio.

+ References

No definition available.

+ Details

Name:	aray_FixedChargeCoverageRatio
Namespace Prefix:	aray_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Initial borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

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

- Definition

Percentage of minimum drawn balance under the credit facility arrangement.

+ References

No definition available.

+ Details

Name:	aray_LineOfCreditFacilityMinimumDrawnBalancePercentage
Namespace Prefix:	aray_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of borrowing capacity reduces due to the amendments in borrowing capacity.

+ References

No definition available.

+ Details

Name:	aray_LineOfCreditFacilityReductionInBorrowingCapacity
Namespace Prefix:	aray_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Period of volume weighted averaging price which is used to determine number of shares.

+ References

No definition available.

+ Details

Name:	aray_PeriodOfVolumeWeightedAveragingPriceWhichIsUsedToDetermineNumberOfShares
Namespace Prefix:	aray_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Repayment of convertible notes along with accrued interest.

+ References

No definition available.

+ Details

Name:	aray_RepaymentOfConvertibleDebtAndAccruedInterest
Namespace Prefix:	aray_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

+ References

+ Details

Name:	us-gaap_CommonStockValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

+ Details

Name:	us-gaap_DebtConversionConvertedInstrumentSharesIssued1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031898-161870

+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(5))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=aray_NinetyDayLiborMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aray_RepurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aray_RevolvingCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aray_CombinedTermLoanAndCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aray_TermLoanFacilityDueDecemberTwoThousandTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=aray_ConvertibleSeniorNotesThreePointFiveZeroPercentDueFebruaryTwoThousandEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_OtherExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=aray_SeriesAConvertibleSeniorNotesThreePointFiveZeroPercentDueTwoThousandEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=aray_ConvertibleSeniorNotesThreePointSevenFivePercentDueTwoThousandTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aray_ExchangeAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=aray_ConvertibleNotesThreePointFiveZeroPercentDueTwoThousandEighteenAndSeriesASeniorNotesThreePointFivePercentDueFebruaryTwoThousandEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Additional Information (Details)					1 Months Ended			3 Months Ended
Debt - Additional Information (Details)	Feb. 07, 2018 shares	Feb. 01, 2018 USD ($) shares	Jan. 30, 2018 USD ($)	Jun. 14, 2017 USD ($)	Dec. 31, 2017 USD ($)	Apr. 30, 2014 USD ($) $ / shares	Feb. 28, 2013 USD ($) $ / shares	Dec. 31, 2018	Sep. 30, 2018 USD ($) $ / shares	Jun. 30, 2018 USD ($)	Sep. 30, 2017	Aug. 31, 2017 USD ($)
Debt
Common stock value									$ 86,000	$ 86,000
Principal amount of the Notes									$ 145,422,000	148,685,000
Minimum
Debt
Fixed Charge Coverage Ratio									75.00%
Scenario, Forecast \| Minimum
Debt
Fixed Charge Coverage Ratio								50.00%
Revolving Credit Facility
Debt
Principal amount of the Notes									$ 20,422,000	23,685,000
Initial borrowing capacity				$ 52,000,000
Minimum drawn balance (as a percent)				30.00%
Outstanding revolving credit facility									$ 20,400,000
90-day LIBOR \| Revolving Credit Facility
Debt
Interest rate determination basis									90-day LIBOR
Variable rate (as a percent)				4.50%
Repurchase
Debt
Repurchase/Retirement of existing notes												$ 28,000,000
Revolving Credit Agreement \| Revolving Credit Facility
Debt
Reduced borrowing capacity					$ 32,000,000
Combined Term Loan and Credit Agreement Member
Debt
Debt agreement Amendment date									Jul. 31, 2018
Term Loan Facility due December 2022
Debt
Principal amount of the Notes									$ 40,000,000	$ 40,000,000
Term Loan Facility due December 2022 \| Term loan
Debt
Principal amount of the Notes									$ 40,000,000
Initial term loan borrowing capacity					40,000,000
Additional term loan borrowing capacity					$ 20,000,000
Loan prepayment fees for first year (percentage)					3.00%
Loan prepayment fees for second year (percentage)					2.00%
Loan prepayment fees for third year (percentage)					1.00%
Term of loan (in months)					60 months
Term of interest payable (in months)					24 months
Administrative fee payable on term loan as a percentage					0.25%
Final payment of administrative fee payable on term loan as a percentage					4.00%
Term Loan Facility due December 2022 \| 90-day LIBOR \| Term loan
Debt
Interest rate determination basis									90-day LIBOR
Variable rate (as a percent)					6.75%
3.50% Convertible Senior Notes
Debt
Interest rate (as a percent)							3.50%				3.50%
Conversion rate, number of shares to be issued per $1000 of principal amount (in shares)							187.6877
Principal amount used for debt instrument conversion ratio							$ 1,000
Conversion price (in dollars per share) \| $ / shares							$ 5.33
Repayment of convertible debt and accrued interest		$ 13,200,000	$ 13,000,000
Common stock value			300,000
Period of volume weighted averaging price which is used to determine total number of shares	3 days
3.50% Convertible Senior Notes \| Other expense, net
Debt
Extinguishment of debt			$ 300,000
3.50% Convertible Senior Notes \| Common Stock
Debt
Common stock shares issued to note holders \| shares	253,000
3.50% Series A Convertible Notes
Debt
Interest rate (as a percent)						3.50%
Conversion rate, number of shares to be issued per $1000 of principal amount (in shares)						187.6877
Principal amount used for debt instrument conversion ratio						$ 1,000
Conversion price (in dollars per share) \| $ / shares						$ 5.33
Repayment of convertible debt and accrued interest		$ 27,000,000
3.50% Series A Convertible Notes \| Common Stock
Debt
Common stock shares issued to settle Convertible Notes \| shares		1,252
3.75% Convertible Senior Notes due 2022
Debt
Interest rate (as a percent)									3.75%	3.75%		3.75%
Conversion rate, number of shares to be issued per $1000 of principal amount (in shares)									174.8252
Principal amount used for debt instrument conversion ratio									$ 1,000
Conversion price (in dollars per share) \| $ / shares									$ 5.72
Aggregate principal amount of debt issued												$ 85,000,000
Repurchase price, as a percentage of the principal amount, in the event of a fundamental change, as defined in Indenture									100.00%
Principal amount of the Notes									$ 85,000,000	$ 85,000,000
3.75% Convertible Senior Notes due 2022 \| Exchange
Debt
Aggregate principal amount of debt issued												53,000,000
3.75% Convertible Senior Notes due 2022 \| Repurchase
Debt
Aggregate principal amount of debt issued												32,000,000
3.50% Convertible Notes due 2018 and 3.5% Series A Senior Notes due February 2018
Debt
Interest rate (as a percent)									3.50%
3.50% Convertible Notes due 2018 and 3.5% Series A Senior Notes due February 2018 \| Exchange
Debt
Aggregate principal amount of debt issued												$ 47,000,000