Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.7.0.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2017
Apr. 28, 2017
Document and Entity Information [Abstract]    
Entity Registrant Name STAMPS.COM INC  
Entity Central Index Key 0001082923  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   16,938,004
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2017