Fair Value of Contingent Liability (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Fair Value of Contingent Liability (Textual) [Abstract]
Contingent Liability First Milestone Payment Cash Paid	$ 0.6
Contingent Liability Second Milestone Payment	$ 1.2

Contingent liability first milestone payment cash paid.

No definition available.

Name:	smsi_ContingentLiabilityFirstMilestonePaymentCashPaid
Namespace Prefix:	smsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration