Document and Entity Information - shares	9 Months Ended
	Mar. 31, 2019	Nov. 30, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	Super Micro Computer, Inc.
Entity Central Index Key	0001375365
Current Fiscal Year End Date	--06-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Smaller Reporting Company	false
Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		50,085,282