Future Payments Related to Acquisition (Detail) (KSCP, USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
KSCP
Business Acquisition [Line Items]
2013	$ 2,500
2014	3,500
2015	$ 9,000

Business Combination Future Payments Due, Remainder of Fiscal year

No definition available.

Name:	sgnt_BusinessCombinationFuturePaymentsDueRemainderOfFiscalYear
Namespace Prefix:	sgnt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant