v3.23.1

Note 3 - Discontinued Operations (Details Textual) - DSUVIA [Member] - Discontinued Operations [Member] $ in Millions	Mar. 12, 2023 USD ($)
Disposal Group, Including Discontinued Operation, Consideration	$ 1.1
Disposal Group, Including Discontinued Operation, Percentage of Royalty on Commercial Sales	15.00%
Disposal Group, Including Discontinued Operation, Maximum Amount in Sales-based Milestone	$ 116.5
Department of Defense [Member]
Disposal Group, Including Discontinued Operation, Percentage of Royalty on Commercial Sales	75.00%

X

- Definition

Maximum amount in sales-based milestone for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	acrx_DisposalGroupIncludingDiscontinuedOperationMaximumAmountInSalesbasedMilestone
Namespace Prefix:	acrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of royalty on commercial sales as a percentage for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	acrx_DisposalGroupIncludingDiscontinuedOperationPercentageOfRoyaltyOnCommercialSales
Namespace Prefix:	acrx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=acrx_DSUVIAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_SegmentDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=acrx_DepartmentOfDefenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: