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DERIVATIVE INSTRUMENTS: (Details) | 3 Months Ended | 5 Months Ended | 6 Months Ended
--- | --- | --- | ---
Mar. 31, 2022 USD ($) $ / item | Mar. 31, 2022 USD ($) | Jun. 30, 2022 item
Derivatives designated as hedging instruments under ASC 815 |  |  |
Number of derivative contracts entered | item |  |  | 2
Derivative instruments held | item |  |  | 0
Call Option | Natural Gas | Derivatives designated as hedging instruments |  |  |
Derivatives designated as hedging instruments under ASC 815 |  |  |
Gas volume (MMBTUs) | 5,285,000 | 5,285,000 |
Hedge premium ($per MMBTU) | $ / item | 0.55 |  |
Cost (million $) | $ (1,700,000) | $ (2,900,000) |
Profit (million $) | 500,000 | 500,000 |
Net favorable/unfavorable effect (million $) | $ (1,200,000) | $ (2,400,000) |
Derivative instruments held | 500,000 | 500,000 |
Swap contracts | Natural Gas | Derivatives designated as hedging instruments |  |  |
Derivatives designated as hedging instruments under ASC 815 |  |  |
Gas volume (MMBTUs) | 5,285,000 | 5,285,000 |
Reference price (swap: $per MMBTU)) | $ / item | 3.75 |  |
Profit (million $) | $ 1,700,000 | $ 4,700,000 |
Net favorable/unfavorable effect (million $) | $ 1,700,000 | $ 4,700,000 |
Derivative instruments held | 2,300,000 | 2,300,000 |

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