| In millions, except per share items | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues [+] | 93.8 | 118.4 | 88.0 | 46.2 | 77.7 | 208.6 | 203.3 | 180.8 |
| Oil & gas sales | | | | | 79.1 | 208.5 | 202.6 | 180.5 |
| Other | | | | 0.8 | -1.4 | 0.0 | 0.7 | 0.3 |
| Revenue growth | -20.7% | 34.5% | 90.7% | | -62.8% | 2.6% | 12.4% | -10.1% |
| Cost of goods sold [+] | 2.8 | 2.6 | 2.6 | 1.2 | 24.8 | 48.5 | 47.6 | 48.0 |
| Lease costs | | | | | 15.5 | 29.5 | 27.3 | 25.9 |
| Direct taxes | | | | | 4.6 | 9.9 | 9.8 | 8.1 |
| Natural gas midstream costs | | | | | 4.7 | 9.1 | 10.5 | 13.9 |
| Gross profit | 91.1 | 115.8 | 85.4 | 45.0 | 52.8 | 160.1 | 155.7 | 132.9 |
| Gross margin | 97.1% | 97.8% | 97.0% | 97.4% | 68.0% | 76.7% | 76.6% | 73.5% |
| Selling, general and administrative [+] | 18.0 | 20.8 | 19.7 | 16.7 | 27.7 | 33.7 | 34.1 | 28.9 |
| General and administrative [+] | 18.0 | 20.8 | 19.7 | 16.7 | 27.7 | 33.7 | 34.1 | 28.9 |
| General and administrative expenses | 18.0 | 20.8 | 19.7 | 16.7 | 27.7 | 33.7 | 34.1 | 28.9 |
| Other selling, general and administrative | | | | | | | | |
| Other operating expenses [+] | 32.1 | 33.2 | 22.0 | 18.3 | 440.3 | 345.4 | 22.6 | 26.4 |
| Exploration expenses | | | | | 41.8 | 6.2 | 22.8 | 23.1 |
| EBITDA [+] | 41.0 | 61.8 | 43.8 | 10.0 | -415.2 | -219.1 | 99.0 | 77.5 |
| EBITDA growth | -33.7% | 41.3% | 338.9% | | 89.5% | -321.2% | 27.7% | -32.4% |
| EBITDA margin | 43.7% | 52.2% | 49.7% | 21.6% | -534.7% | -105.1% | 48.7% | 42.9% |
| Depreciation and amortization | 46.6 | 50.7 | 26.8 | 12.1 | 79.3 | 135.7 | 135.4 | 141.2 |
| EBIT [+] | -5.6 | 11.1 | 16.9 | -2.2 | -494.5 | -354.8 | -36.3 | -63.7 |
| EBIT growth | -150.4% | -34.5% | -885.9% | | 39.4% | 877.2% | -43.0% | 273.1% |
| EBIT margin | -6.0% | 9.4% | 19.3% | -4.7% | -636.9% | -170.1% | -17.9% | -35.2% |
| Non-recurring items [+] | 36.1 | | -0.5 | 0.0 | | | | |
| Asset impairment | 36.1 | | | | 452.0 | 331.9 | | 47.8 |
| Loss (gain) on sale of assets | | | | | -53.5 | 3.5 | -0.1 | |
| Interest expense, net [+] | 7.0 | 11.0 | 11.9 | 9.7 | 54.8 | 47.7 | 51.1 | 52.4 |
| Interest expense | 7.0 | 11.0 | 11.9 | 9.7 | 54.8 | 47.8 | 51.2 | 52.4 |
| Interest income | | | | | | 0.1 | 0.1 | 0.0 |
| Other income (expense), net [+] | 4.6 | 13.2 | -3.8 | 2.9 | 69.9 | 49.4 | -7.8 | 31.9 |
| Reorganization items | | | -0.3 | 0.1 | | | | |
| Gain (loss) on sale of assets | | | | | -53.5 | 3.5 | -0.1 | -44.6 |
| Gain (loss) on debt retirement | | -1.8 | | | 62.6 | | -7.1 | |
| Gain (loss) on derivative instruments | 4.4 | 15.0 | -4.0 | 1.6 | 7.4 | 49.4 | -0.7 | 31.9 |
| Other | | | | | 15.1 | 1.7 | -58.9 | -20.5 |
| Pre-tax income | -44.1 | 13.3 | 1.7 | -9.0 | -479.4 | -353.1 | -95.2 | -84.2 |
| Income taxes | 0.0 | 0.0 | -0.1 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Tax rate | 0.0% | 0.0% | | 10.9% | 0.0% | 0.0% | 0.0% | 0.0% |
| Net income | -44.1 | 13.3 | 1.8 | -8.0 | -409.9 | -382.9 | -113.8 | -90.2 |
| Net margin | -47.0% | 11.2% | 2.0% | -17.3% | -527.9% | -183.6% | -56.0% | -49.9% |
| |
| Basic EPS [+] | ($3.50) | $1.09 | $0.15 | ($0.80) | ($7.28) | ($8.62) | ($2.99) | ($2.48) |
| Growth | -422.1% | 621.4% | -118.8% | | -15.6% | 188.7% | 20.4% | 137.0% |
| Diluted EPS [+] | ($3.50) | $0.96 | $0.13 | ($0.80) | ($7.28) | ($8.62) | ($2.99) | ($2.48) |
| Growth | -465.8% | 646.7% | -116.0% | | -15.6% | 188.7% | 20.4% | 137.0% |
| |
| Shares outstanding (basic) [+] | 12.6 | 12.2 | 11.6 | 10.0 | 56.3 | 44.4 | 38.1 | 36.4 |
| Growth | 3.1% | 5.3% | 16.5% | | 26.8% | 16.5% | 4.7% | 0.7% |
| Shares outstanding (diluted) [+] | 12.6 | 13.9 | 13.7 | 10.0 | 56.3 | 44.4 | 38.1 | 36.4 |
| Growth | -9.2% | 1.7% | 37.0% | | 26.8% | 16.5% | 4.7% | 0.7% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |