Note 7 - Prepaid Expenses (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
Jun. 30, 2014	Dec. 31, 2013
Prepaid Expenses And Other Assets [Abstract]
Upfront Fees Included in Prepaid Research and Development Expenses	$ 2.6	$ 2.7

Amount represents upfront payments made to Clinical Research Organizations, that is a component of total prepaid research and development expenses.

No definition available.

Name:	sphs_UpfrontFeesIncludedInPrepaidResearchAndDevelopmentExpenses
Namespace Prefix:	sphs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration