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SEGMENTS AND MAJOR CUSTOMERS (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2012
Segment
Dec. 31, 2011
Dec. 31, 2010
Segment Reporting Information [Line Items]                              
Number of operating segments                         2    
Segment Reporting Information, Results of operations [Abstract]                              
Total revenues                         $ 32,534 $ 30,958 $ 26,548
Total operating expenses                         33,769 27,913 18,561
Total interest expenses                         193 304 48
Operating income (loss) from identified segments (5,932) (2,709) (991) (712) (2,475) 875 400 (4,864) (2,862) (958) (297) 1,250 (10,344) (5,216) (986)
General and administrative expenses                         (9,109) (8,261) (8,973)
Add back Interest expenses                         193 304 48
Other revenues and expenses:                         849 (717) (332)
(Loss) income before income taxes and discontinued operations (6,131) (3,155) 624 (833) (2,362) 1,022 339 (4,932) (2,359) (950) (176) 2,340 (9,495) (5,933) (1,318)
Depreciation depletion and amortization expense [Abstract]                              
Total depreciation expense                         15,456 14,593 11,067
Assets by segment [Abstract]                              
Total Assets 140,827       162,439       156,016       140,827 162,439 156,016
Oil and Gas [Member]
                              
Segment Reporting Information, Results of operations [Abstract]                              
Total revenues                         32,534 30,958 26,548
Total operating expenses                         30,870 25,549 16,683
Total interest expenses                         169 268 0
Operating income (loss) from identified segments                         1,495 5,141 9,865
Add back Interest expenses                         169 268 0
Depreciation depletion and amortization expense [Abstract]                              
Total depreciation expense                         14,893 13,997 10,610
Assets by segment [Abstract]                              
Total Assets 93,839       109,141       75,639       93,839 109,141 75,639
Mineral properties [Member]
                              
Segment Reporting Information, Results of operations [Abstract]                              
Total operating expenses                         2,899 2,364 1,878
Total interest expenses                         24 36 48
Operating income (loss) from identified segments                         (2,923) (2,400) (1,926)
Add back Interest expenses                         24 36 48
Depreciation depletion and amortization expense [Abstract]                              
Total depreciation expense                         127 102 77
Assets by segment [Abstract]                              
Total Assets 20,747       20,755       20,800       20,747 20,755 20,800
Corporate [Member]
                              
Depreciation depletion and amortization expense [Abstract]                              
Total depreciation expense                         436 494 380
Assets by segment [Abstract]                              
Total Assets 26,241       32,543       59,577       26,241 32,543 59,577
Reportable Segment [Member]
                              
Segment Reporting Information, Results of operations [Abstract]                              
Operating income (loss) from identified segments                         $ (1,428) $ 2,741 $ 7,939