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Convertible Subordinated Notes Convertible Subordinated Notes (Liability and Equity Components) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 12, 2021
Debt Instrument [Line Items]
Accumulated Amortization, Debt Issuance Costs	$ 1,324	$ 819
Debt Issuance Costs, Net	1,543	1,136
Amortization of debt issuance costs	576	782	$ 392
Convertible subordinated notes
Debt Instrument [Line Items]
Accumulated Amortization, Debt Issuance Costs		63
Principal amount	0	2,559		$ 200
Unamortized discount of liability component	0	(20)
Debt Issuance Costs, Net	0	1
Convertible subordinated notes due 2021	0	2,538
Carrying value of the equity component	0	319
Interest expense	18	149	174
Accretion of discount	20	216	241
Amortization of debt issuance costs	$ 1	$ 20	$ 24

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- Definition

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, after accumulated amortization, of debt discount.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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