Bonus Target

No definition available.

Name:	elgx_BonusTarget
Namespace Prefix:	elgx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Housing Allowance

+ References

No definition available.

+ Details

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

- Definition

Housing Allowance Period

+ References

No definition available.

+ Details

Name:	elgx_HousingAllowancePeriod
Namespace Prefix:	elgx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Eligible Performance Awards

+ References

No definition available.

+ Details

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

- Definition

Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_EmployeeRelatedLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Expenditures for salaries for officers and non-officers. Does not include allocated share-based compensation, pension and post-retirement benefit expense or other labor-related non-salary expense. For commercial and industrial companies, excludes any direct and overhead labor that is included in cost of goods sold.

+ References

No definition available.

+ Details

Name:	us-gaap_SalariesWagesAndOfficersCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Event (Details) - USD ($)	May 02, 2018	Mar. 31, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Sign on bonus		$ 14,519,000	$ 15,054,000
Chief Executive Officer \| Subsequent Event
Subsequent Event [Line Items]
Salary	$ 600,000
Sign on bonus	$ 666,667
Bonus target	100.00%
Housing allowance	$ 4,000
Housing allowance period	36 months
Stock Option \| Chief Executive Officer \| Subsequent Event
Subsequent Event [Line Items]
Eligible performance awards	$ 450,000
Restricted stock units \| Chief Executive Officer \| Subsequent Event
Subsequent Event [Line Items]
Eligible performance awards	$ 450,000