Area of space leased under operating lease.

No definition available.

Name:	acor_AreaOfSpaceLeasedUnderOperatingLease
Namespace Prefix:	acor_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of base rent due on an annual basis due in monthly installments.

+ References

No definition available.

+ Details

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Namespace Prefix:	acor_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Base rent due next twelve months.

+ References

No definition available.

+ Details

Name:	acor_BaseRentDueNextTwelveMonths
Namespace Prefix:	acor_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Base rent subject to annual escalation percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	acor_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contribution Of Fund Agreed.

+ References

No definition available.

+ Details

Name:	acor_ContributionOfFundAgreed
Namespace Prefix:	acor_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Operating lease remaining lease term.

+ References

No definition available.

+ Details

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Namespace Prefix:	acor_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Termination Fee

+ References

No definition available.

+ Details

Name:	acor_TerminationFee
Namespace Prefix:	acor_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Termination option effective date.

+ References

No definition available.

+ Details

Name:	acor_TerminationOptionEffectiveDate
Namespace Prefix:	acor_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date which lease or group of leases is set to expire, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

Description of lessee's operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980

+ Details

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

- Definition

Indicates (true false) whether lessee has option to extend operating lease.

+ References

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-Publisher FASB
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- Definition

Indicates (true false) whether lessee has option to terminate operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 3
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Indicates (true false) whether sublessee has option to extend operating sublease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
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Period Type:	instant

- Details

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- Details

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- Details

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Leases - Additional Information (Details)	9 Months Ended	12 Months Ended
Leases - Additional Information (Details)	Sep. 30, 2022 USD ($) ft²	Dec. 31, 2021 USD ($)	Jun. 30, 2022 ft²	Dec. 31, 2018 ft²	Oct. 31, 2016 USD ($) ft²
Operating Lease Information
Operating lease description	Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and initial direct costs incurred, if any. The Company’s leases have remaining lease terms of 4.25 years to 5.75 years. The Company has exercised the option to terminate the Ardsley lease with a termination date of June 22, 2022.
Operating lease renewal option	true
Operating lease termination option	true
Operating lease termination date	Jun. 22, 2022
Operating lease weighted-average remaining lease term	4 years 7 months 6 days
Operating lease weighted-average discount rate	7.89%
Ardsley, New York
Operating Lease Information
Area of leased property \| ft²	160,000
Termination option effective date	Jun. 22, 2022
Termination Fee	$ 4,700,000
Pearl River, New York
Operating Lease Information
Area of leased property \| ft²			21,000
Lease term			6 years
Operating sublease, existence of option to extend	false
Base rent	$ 0
Base rent payment commencing on January 1, 2023	$ 300,000
Base rent subject to annual escalation percentage	2.00%
Chelsea, Massachusetts \| Manufacturing Facility
Operating Lease Information
Area of leased property \| ft²				95,000
Contribution Of Fund Agreed		$ 1,500,000
Waltham, MA \| Office and Laboratory Space
Operating Lease Information
Area of leased property \| ft²					26,000
Lease term					10 years
Base rent					$ 1,200,000
Minimum
Operating Lease Information
Operating lease remaining lease term	4 years 3 months
Maximum [Member]
Operating Lease Information
Operating lease remaining lease term	5 years 9 months