v3.23.2

Note 4 - Asset Acquisition - Consideration for Acquisition (Details) (Parentheticals)	Jan. 07, 2022 shares
Lowell Therapeutics [Member]
Business Combination, Acquiree Common Stock to Be Held Back to Satisfy Some Obligations (in shares)	69,808

X

- Definition

Represents acquiree common stock to be held back to satisfy some obligations.

+ References

No definition available.

+ Details

Name:	acrx_BusinessCombinationAcquireeCommonStockToBeHeldBackToSatisfySomeObligations
Namespace Prefix:	acrx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=acrx_LowellTherapeuticsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: