Manufactured Methane Facilities (Schedule Of The Manufactured Methane Facilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Methane Project [Line Items]
Manufactured Methane facilities, at cost, net of impairment	$ 445	$ 513
Accumulated depreciation	(245)	(313)
Manufactured Methane facilities, net	200	200
Methane Project [Member]
Methane Project [Line Items]
Manufactured Methane facilities, at cost, net of impairment	1,634	1,634
Accumulated depreciation	(60)
Manufactured Methane facilities, net	$ 1,574	$ 1,634

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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 210.5-02.13)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 13
-Subparagraph a
-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 8
-Article 7

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