Balance Sheet Account Detail Amortization (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Balance Sheet Related Disclosures [Abstract]
Remainder of 2013	$ 166
2014	392
2015	879
2016	1,542
2017 and thereafter	$ 33,078

Finite-Lived Intangible Assets, Amortization Expense, Year Five and Thereafter

No definition available.

Name:	elgx_FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndThereafter
Namespace Prefix:	elgx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant