Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2021
Nov. 02, 2021
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Entity Registrant Name Recro Pharma, Inc.  
Entity Central Index Key 0001588972  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   46,614,535
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company false  
Trading Symbol REPH  
Entity File Number 001-36329  
Entity Tax Identification Number 26-1523233  
Entity Address, Address Line One 1 E. Uwchlan Ave, Suite 112  
Entity Address, City or Town Exton  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19341  
City Area Code 770  
Local Phone Number 534-8239  
Entity Incorporation, State or Country Code PA  
Document Quarterly Report true  
Document Transition Report false  
Security Exchange Name NASDAQ  
Title of 12(b) Security Common Stock, par value $0.01