Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2020
Nov. 02, 2020
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Entity Registrant Name GOLDFIELD CORP  
Entity Central Index Key 0000042316  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Current Fiscal Year End Date --12-31  
Entity File Number 1-7525  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 88-0031580  
Entity Filer Category Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business true  
Entity Shell Company false  
Title of 12(b) Security Common Stock, par value $0.10 per share  
Trading Symbol GV  
Security Exchange Name NYSEAMER  
Entity Address, Address Line One 1684 W. Hibiscus Boulevard  
Entity Address, City or Town Melbourne  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 32901  
City Area Code 321  
Local Phone Number 724-1700  
Entity Common Stock, Shares Outstanding   24,522,534
Document Quarterly Report true  
Document Transition Report false