Debt Instrument, Term, Extension Period

No definition available.

Name:	atrx_DebtInstrumentTermExtensionPeriod
Namespace Prefix:	atrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Default Interest Rate

+ References

No definition available.

+ Details

Name:	atrx_DefaultInterestRate
Namespace Prefix:	atrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of amortization expense attributable to debt issuance costs.

+ References

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+ Details

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

- Definition

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

+ References

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+ Details

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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

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

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

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

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+ Details

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

- 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_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_TypeOfArrangementAxis=atrx_TermLoanSubscriptionAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=atrx_AccreditedInvestorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Term Loan (Details) - USD ($) $ in Thousands			12 Months Ended
Term Loan (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Aug. 05, 2019	Dec. 31, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Interest expense			$ 682
Amortization of debt issuance costs			$ 360	$ 0
Term Loan Subscription Agreements \| Accredited Investors
Short-term Debt [Line Items]
Aggregate principal amount		$ 5,700
Debt issuance costs		$ 707
Notes interest rate		12.00%
Extension period		60 days
Default interest rate	15.00%