Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2019
Mar. 06, 2020
Jun. 30, 2019
Document And Entity Information      
Entity Registrant Name Atomera Inc    
Entity Central Index Key 0001420520    
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity's Reporting Status Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 78,597,563
Entity Common Stock, Shares Outstanding   17,305,483  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2019    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Transition Period true    
Entity a Well-known Seasoned Issuer No    
Entity a Voluntary Filer No    
Entity Shell Company false    
Interactive Data Current Yes    
Entity Incorporation State Country Code DE    
Entity File Number 001-37850