v3.22.2.2
Cover - shares
6 Months Ended
Jun. 30, 2022
Aug. 15, 2022
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2022  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2022  
Current Fiscal Year End Date --12-31  
Entity File Number 000-30414  
Entity Registrant Name ALR TECHNOLOGIES INC.  
Entity Central Index Key 0001087022  
Entity Tax Identification Number 88-0225807  
Entity Incorporation, State or Country Code NV  
Entity Address, Address Line One 7400 Beaufont Springs Drive  
Entity Address, Address Line Two Suite 300  
Entity Address, City or Town Richmond  
Entity Address, State or Province VA  
Entity Address, Postal Zip Code 23225  
City Area Code (804)  
Local Phone Number 554-3500  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   551,966,844