Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 18, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Trading Symbol	MSTR
Entity Registrant Name	MICROSTRATEGY INC
Entity Central Index Key	0001050446
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		9,406,910
Class B Convertible
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,035,184