Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
Dec. 31, 2010
Consolidated Statements of Changes in Stockholders' Equity
Sale of series B preferred stock, offering costs	$ 382,500

Specific incremental costs directly attributable to a proposed or actual offering of securities which are related to preferred stock issued during the reporting period.

No definition available.

Name:	spex_PreferredStockOfferingCosts
Namespace Prefix:	spex_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration