Equity Income in Unconsolidated Investment	3 Months Ended
Equity Income in Unconsolidated Investment	Mar. 31, 2014
Equity Income in Unconsolidated Investment [Abstract]
Equity Income in Unconsolidated Investment	10) Equity Income in Unconsolidated Investment USE owns 19.54% of Standard Steam Trust, LLC (“SST”), a Denver, Colorado based private geothermal resource acquisition and development company. At December 31, 2013, we recorded an impairment of $2.2 million on the investment in SST 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. During the three months ended March 31, 2013, we recorded an equity loss of $25,000 from our unconsolidated investment in SST.

The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group.

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