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Convertible Subordinated Notes (Liability and Equity Components) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Amortization of debt issuance costs	$ 552	$ 576	$ 782
Convertible subordinated notes
Debt Instrument [Line Items]
Interest expense	0	18	149
Accretion of discount	0	20	216
Amortization of debt issuance costs	$ 0	$ 1	$ 20

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Amount of accretion of discount for the standardized measure of discounted future net cash flow related to proved oil and gas reserves.

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Amount of amortization expense attributable to debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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