v2.4.0.6
Document And Entity Information (USD $)
 3 Months Ended
Mar. 31, 2012
May 11, 2012
Document and Entity Information [Abstract]    
Entity Registrant Name ALR Technologies Inc.  
Document Type 10-Q  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   213,977,909
Entity Public Float   $ 106,997,178
Amendment Flag false  
Entity Central Index Key 0001087022  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Filer Category Smaller Reporting Company  
Entity Well-known Seasoned Issuer No  
Document Period End Date Mar. 31, 2012  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q1