Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2021
Oct. 29, 2021
Cover [Abstract]    
Document Type 10-Q/A  
Amendment Flag true  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
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   16,066,421
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Shell Company false  
Title of 12(b) Security Common Stock par value $0.001 per share  
Security Exchange Name NASDAQ  
Entity File Number 001-38907  
Entity Incorporation, State or Country Code DE  
Entity Address, State or Province TX  
Entity Address, Address Line One 6500 River Place Boulevard, Bldg. 7  
Entity Address, Address Line Two S#250  
Entity Address, City or Town Austin  
Entity Tax Identification Number 94-3336783  
Entity Address, Postal Zip Code 78730  
City Area Code 650  
Local Phone Number 378-8100  
Document Quarterly Report true  
Document Transition Report false  
Amendment Description This Amendment No. 1 on Form 10-Q/A (“Amendment No. 1”) amends our Quarterly Report for the fiscal quarter ended September 30, 2021 filed with the U.S. Securities and Exchange Commission (the “SEC”) on November 12, 2021 (“the “Original Filing”). We are filing Amendment No. 1 solely for the purpose of (i) correcting the signatories included within Exhibits 31.1 and 32.1 and (ii) adding the management certification regarding any change in internal control over financial reporting in paragraph 4(d) of Exhibits 31.1 and 31.2 as required by Item 601(b)(31) of Regulation S-K.  Except as otherwise noted in this Explanatory Note, no other changes were made to the Original Filing. This Amendment No. 1 speaks as of the Original Filing date, and does not reflect events that may have occurred subsequent to the Original Filing date.