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EXCEL - IDEA: XBRL DOCUMENT - DEXCOM INCFinancial_Report.xls
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EX-32.02 - CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350 - DEXCOM INCd330251dex3202.htm
EX-31.02 - CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO SECURITIES EXCHANGE ACTRULE - DEXCOM INCd330251dex3102.htm
EX-31.01 - CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECURITIES EXCHANGE ACTRULE - DEXCOM INCd330251dex3101.htm
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EX-32.01 - CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350 - DEXCOM INCd330251dex3201.htm
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Financial Statement Details (Short Term Marketable Securities, Available For Sale) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Financial Statement Details [Line Items]    
Amortized Cost $ 65,067 $ 79,359
Gross Unrealized Gains 6 13
Gross Unrealized Losses (8) (14)
Estimated Market Value 65,065 79,358
U.S. Government Agencies [Member]
   
Financial Statement Details [Line Items]    
Amortized Cost 47,709 61,890
Gross Unrealized Gains 6 11
Gross Unrealized Losses (2) (5)
Estimated Market Value 47,713 61,896
Commercial Paper [Member]
   
Financial Statement Details [Line Items]    
Amortized Cost 3,498 7,497
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Estimated Market Value 3,498 7,497
Corporate Debt [Member]
   
Financial Statement Details [Line Items]    
Amortized Cost 13,860 9,972
Gross Unrealized Gains 0 2
Gross Unrealized Losses (6) (9)
Estimated Market Value $ 13,854 $ 9,965