v3.19.3
Cover Page - shares
9 Months Ended
Sep. 30, 2019
Nov. 01, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
Document Transition Report false  
Entity File Number 001-35726  
Entity Registrant Name Radius Health, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 80-0145732  
Entity Address, Address Line One 950 Winter Street  
Entity Address, City or Town Waltham  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02451  
City Area Code 617  
Local Phone Number 551-4000  
Title of 12(b) Security Common Stock, $0.0001 par value per share  
Trading Symbol RDUS  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   46,172,356
Entity Central Index Key 0001428522  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3