Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Feb. 19, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
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   31,012,003  
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 490 Lapp Road    
Entity Address, City or Town Malvern    
City Area Code 484    
Local Phone Number 395-2470    
Entity Address, Postal Zip Code 19355    
Entity Address, State or Province PA    
Entity Incorporation, State or Country Code PA    
Document Annual Report true    
Document Transition Report false    
Security Exchange Name NASDAQ    
Title of 12(b) Security Common Stock, par value $0.01    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Public Float     $ 93.0
Documents Incorporated by Reference Part III of this Annual Report on Form 10-K incorporates certain information by reference from the registrant’s proxy statement for the 2021 annual meeting of shareholders to be filed no later than 120 days after the end of the registrant’s fiscal year ended December 31, 2020.