Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Remaining 2013	$ 494
2014	474
2015 and thereafter	0
Total	$ 968

Operating Leases, Future Minimum Payments, Due in Three Years and Thereafter

No definition available.

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Namespace Prefix:	elgx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant