Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 01, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Trading Symbol SONM  
Entity Registrant Name SONIM TECHNOLOGIES INC  
Entity Central Index Key 0001178697  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Small Business true  
Entity Common Stock, Shares Outstanding   20,357,783
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity File Number 001-38907  
Entity Address, State or Province CA  
Entity Address, Address Line One 1875 South Grant Street  
Entity Address, Address Line Two Suite 750  
Entity Address, City or Town San Mateo  
Entity Tax Identification Number 943336783  
Entity Address, Postal Zip Code 94402  
City Area Code 650  
Local Phone Number 378-8100