6 Months Ended
Jun. 30, 2019
Jul. 29, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name ROSETTA STONE INC  
Entity Central Index Key 0001351285  
Trading Symbol RST  
Document Type 10-Q  
Document Period End Date Jun. 30, 2019  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding (in shares)   24,030,865
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Tax Identification Number 043837082  
Entity File Number 1-34283  
Entity Address Line One 1621 North Kent Street  
Entity Address, Address Line Two Suite 1200  
Entity Address City Arlington  
Entity Address State Virginia  
Entity Address, Postal Zip Code 22209  
City Area Code 703  
Local Phone Number 387-5800