v3.23.2
Document And Entity Information
 12 Months Ended
Dec. 31, 2022
Document Information [Line Items]  
Entity Registrant Name ACELRX PHARMACEUTICALS, INC.
Document, Type 8-K
Document, Period End Date Dec. 31, 2022
Entity, Incorporation, State or Country Code DE
Entity, File Number 001-35068
Entity, Tax Identification Number 41-2193603
Entity, Address, Address Line One 25821 Industrial Blvd., Suite 400
Entity, Address, City or Town Hayward
Entity, Address, State or Province CA
Entity, Address, Postal Zip Code 94545
City Area Code 650
Local Phone Number 216-3500
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock
Trading Symbol ACRX
Security Exchange Name NASDAQ
Entity, Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0001427925
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2022