Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
3 Months Ended
Mar. 31, 2021
May 22, 2021
Cover [Abstract]    
Entity Registrant Name QUANTA INC  
Entity Central Index Key 0001691430  
Document Type 10-Q/A  
Document Period End Date Mar. 31, 2021  
Amendment Flag true  
Amendment Description The purpose of this Amendment No. 1 (this "Amendment") to our Quarterly Report on Form 10-Q for the period ended March 31, 2021 (the "Form 10-Q"), as filed with the Securities and Exchange Commission (the "SEC") on May 25, 2021, is solely to incorporate the hyperlink to the XBRL data related to Form 10Q as filed. This Amendment makes no other changes to the Form 10-Q as filed with the SEC on May 24, 2021, and no attempt has been made in this Amendment to modify or update the other disclosures presented in the Form 10-Q. This Amendment does not reflect subsequent events occurring after the original filing of the Form 10-Q (i.e., those events occurring after May 25, 2021) or modify or update in any way those disclosures that may be affected by subsequent events. Accordingly, this Amendment should be read in conjunction with the Form 10-Q and our other filings with the SEC. No other changes have been made to the Quarterly Report, except that Part II, Item 6 of the Quarterly Report is also being amended to refer to the updated Exhibit Index that is included herein for the purpose of including abbreviated officer certifications that are being filed herewith. This Form 10-Q/A speaks as of the original filing date of the Quarterly Report and has not been updated to reflect events occurring subsequent to the original filing date.  
Current Fiscal Year End Date --12-31  
Entity's Reporting Status Current Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business Flag true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   176,458,527
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2021