XML 65 R48.htm IDEA: XBRL DOCUMENT v3.19.1

CAPITAL STOCK - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) shares
Class of Warrant or Right [Line Items]
Warrant issued (in shares)	2,328,925
At The Market Sale Of Stock
Class of Warrant or Right [Line Items]
Sale of stock, number of shares issued (in shares)	754,712
Sale of stock, consideration received | $	$ 2,410

X

- Definition

Class of Warrant or Right, Issued

+ References

No definition available.

+ Details

Name:	efr_ClassofWarrantorRightIssued
Namespace Prefix:	efr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

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

X

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=efr_AtTheMarketSaleOfStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: