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INVESTMENT IN STANDARD STEAM TRUST, LLC	12 Months Ended
	Dec. 31, 2014
INVESTMENT IN STANDARD STEAM TRUST, LLC [Abstract]
INVESTMENT IN STANDARD STEAM TRUST, LLC	G. INVESTMENT IN STANDARD STEAM TRUST, LLC USE's ownership interest in SST, a Denver, Colorado based private geothermal resource acquisition and development company, was 19.54% at December 31, 2013.  The Company recorded an impairment of $2.2 million on the investment in SST during the year ended December 31, 2013, which reduced the carrying amount of our investment in SST to zero.  Subsequently, we no longer record our share of equity in earnings or losses and recorded no income or loss from SST during the year ended December 31, 2014.  The Company recorded an equity loss in unconsolidated investment related to SST of $104,000 during the year ended December 31, 2013.

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- Definition

The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock.

+ 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 210.5-02.31)

-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 810

-SubTopic 10

-Section 50

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

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