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Supplemental Disclosures (Details 1) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Supplemental disclosures of cash flow information |  |
Asset retirement obligations related to mineral properties | $ 1,434 | $ 1,606
Asset retirement obligations related to support equipment and facilities | (194) | (65)
(Decrease) increase in liabilities for oil and natural gas properties capital expenditures | 2,820 | (11,622)
(Decrease) increase in liabilities for support equipment and facilities | (6,329) | (5,000)
Issuance Of Restricted Stock Units For Board And Advisor Services | 0 | 138
Stock-based compensation expense recognized as liability | (152) | (98)
Increase (Decrease) in Liabilities for Accrued Cost to Issue Equity | (294) | 216
Transfer of inventory from oil and natural gas properties | $ 31 | $ 64

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