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Cover - shares
 6 Months Ended
Jun. 30, 2021
Jul. 31, 2021
Cover [Abstract]    
Entity Registrant Name Crexendo, Inc.  
Entity Central Index Key 0001075736  
Document Type 10-Q  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Small Business true  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity Current Reporting Status Yes  
Document Period End Date Jun. 30, 2021  
Entity Filer Category Non-accelerated Filer  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2021  
Entity Common Stock Shares Outstanding   21,558,644
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Entity File Number 001-32277  
Entity Incorporation State Country Code NV  
Entity Tax Identification Number 87-0591719  
Entity Address Address Line 1 1615 South 52nd Street  
Entity Address City Or Town Tempe  
Entity Address State Or Province AZ  
Entity Address Postal Zip Code 85281  
City Area Code 602  
Local Phone Number 714-8500