Commitments and Contingencies (Details) (Princeton Digital Image [Member])	Mar. 31, 2012
Princeton Digital Image [Member]
Legal Matters [Abstract]
Number of defendants against whom the complaint was filed in addition to the company	7

Number of defendants against whom complaint was filed in addition to company for alleged patent infringements.

No definition available.

Name:	sfly_NumberOfDefendantsAgainstWhomComplaintWasFiledInAdditionToCompany
Namespace Prefix:	sfly_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant