Revenues and Trade Receivables, Net, Summary of Activity with Sales Related Allowances and Accruals (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2019	Dec. 31, 2018
Revenues and Trade Receivables, Net [Roll Forward]
Beginning balance	$ 585
Provision	847
Payments/credits	(535)
Ending balance	897
Accruals for returns allowances and prompt pay discounts	88	$ 104
Accruals for wholesaler fees, co-pay cards and rebates	$ 809	$ 481

- Definition

For an unclassified balance sheet, a valuation of sales allowance for receivables due a company that are expected to be uncollectible and accruals.

+ References

No definition available.

+ Details

Name:	aqst_AccountsReceivableAllowancesAndAccruals
Namespace Prefix:	aqst_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

For an unclassified balance sheet, a valuation of sales allowance for receivables related to credits due a company that are expected to be uncollectible.

+ References

No definition available.

+ Details

Name:	aqst_AccountsReceivableAllowancesCreditsAndPayments
Namespace Prefix:	aqst_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

For an unclassified balance sheet, a valuation of sales allowance for receivables related to sales due a company that are expected to be uncollectible.

+ References

No definition available.

+ Details

Name:	aqst_AccountsReceivableAllowancesProvisionRelatedToSales
Namespace Prefix:	aqst_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of accruals for returns allowances and prompt pay discounts reflected as direct reduction to trade receivables.

+ References

No definition available.

+ Details

Name:	aqst_AccrualsForReturnsAllowancesAndPromptPayDiscounts
Namespace Prefix:	aqst_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of accruals for wholesaler fees, co-pay cards and rebates reflected as current liabilities.

+ References

No definition available.

+ Details

Name:	aqst_AccrualsForWholesalerFeesCoPayCardsAndRebates
Namespace Prefix:	aqst_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	aqst_RevenuesAndTradeReceivablesNetRollForward
Namespace Prefix:	aqst_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration