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Supplemental Disclosures of Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Cash paid for interest	$ 1,548	$ 1,766	$ 2,833
Cash paid for taxes	209	635	207
Non-cash investing activities:
Asset retirement obligation	0	34	(5,114)
Non-cash financing activities:
Equipment purchased with debt	0	0	4,733
Write-off of remaining balance of returned equipment under capital lease	0	0	398
Capitalized expenditures in accounts payable and accrued expenses	$ 1,586	$ 376	$ 899

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Cash Flow Noncash Financing Activities Disclosure [Abstract]

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Cash Flow Noncash Investing Activities Disclosure [Abstract]

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Equipment Purchased With Debt

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Write-off of remaining balance of returned equipment under capital lease.

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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The increase (decrease) during the reporting period in the carrying amount of asset retirement obligations.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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