XML 45 R31.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Policies (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Summary of Significant Accounting Policies (Textual)      
Impairment of unproved oil and gas properties $ 30,906
Capitalized exploration costs 6,714 21,695  
Depreciation 56 49 56
Proceeds from sale of property 14 44
Capital gain on sale of property and equipment $ 10 $ 43
Common stock, par value $ 0.01 $ 0.01  
Common stock equivalents excluded from EPS as the inclusion would be anti-dilutive 9,441,833 9,196,696 6,701,596
Deferred offering costs $ 63 $ 90 $ 118
Maximum [Member]      
Summary of Significant Accounting Policies (Textual)      
Property and equipment, estimated useful lives 14 years    
Minimum [Member]      
Summary of Significant Accounting Policies (Textual)      
Property and equipment, estimated useful lives 3 years