Annual report pursuant to Section 13 and 15(d)

SUPPLEMENTAL CASH FLOW INFORMATION - Supplemental Disclosure of Cash Flow Information (Details)

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SUPPLEMENTAL CASH FLOW INFORMATION - Supplemental Disclosure of Cash Flow Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]      
Non-cash accruals of property, plant and equipment and other non-current assets $ 11,759 $ 8,630 $ 83
2019 Term Loan paid-in-kind election 1,773 0 0
Future proceeds from sale of Magellan Petroleum UK 1,384 0 0
Tradable equity securities 5,069 0 0
Non-cash settlement of withholding taxes associated with the 2018 and 2017 bonus paid and vesting of certain awards, respectively 6,686 5,733 828
Non-cash settlement of the 2018 and 2017 bonus paid, respectively 18,396 15,202 0
Asset retirement obligation additions and revisions 182 115 0
Equity offering cost accrual $ 0 0 $ 65
Escrow deposit   $ 400