Debt Instrument, Principal, Amount Deferred

No definition available.

Name:	aqst_DebtInstrumentPrincipalAmountDeferred
Namespace Prefix:	aqst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Instrument, Principal, Number Of Quarterly Payments

+ References

No definition available.

+ Details

Name:	aqst_DebtInstrumentPrincipalNumberOfQuarterlyPayments
Namespace Prefix:	aqst_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt 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(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

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

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

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

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

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

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=aqst_TwelvePointFiveSeniorSecuredNotesDueJune302025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=aqst_EquityDistributionAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details) $ in Thousands		1 Months Ended
Subsequent Events (Details) $ in Thousands	Oct. 07, 2021 USD ($) payment	Oct. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Sep. 30, 2021	Jul. 15, 2019
Senior Secured Notes Due 2025
Subsequent Event [Line Items]
Interest rate				12.50%
Senior Secured Notes Due 2025 \| Senior Notes
Subsequent Event [Line Items]
Interest rate				12.50%	12.50%
Subsequent Event \| Senior Secured Notes Due 2025 \| Senior Notes
Subsequent Event [Line Items]
Prepayment premiums paid	$ 2,700
Number of quarterly payments \| payment	4
Amount of principal payments deferred	$ 10,300
Equity Distribution Agreement
Subsequent Event [Line Items]
Number of shares issued in transaction (in shares) \| shares			930,993
Consideration received on sale of stock			$ 6,055
Equity Distribution Agreement \| Subsequent Event
Subsequent Event [Line Items]
Number of shares issued in transaction (in shares) \| shares		80,783
Consideration received on sale of stock		$ 313