v3.19.3.a.u2
Cover - shares
3 Months Ended
Sep. 30, 2019
Nov. 30, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
Document Transition Report false  
Entity File Number 001-33383  
Entity Registrant Name Super Micro Computer, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 77-0353939  
Entity Address, Address Line One 980 Rock Avenue  
Entity Address, City or Town San Jose  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 95131  
City Area Code 408  
Local Phone Number 503-8000  
Title of 12(b) Security Common Stock, $0.001 par value per share  
Trading Symbol SMCI  
Entity Current Reporting Status Yes  
Entity Interactive Data Current No  
Entity Filer Category Large Accelerated Filer  
Smaller Reporting Company false  
Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   50,085,282
Entity Central Index Key 0001375365  
Current Fiscal Year End Date --06-30  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Amendment Flag false