Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net loss	$ (16,942)	$ (69,104)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	13,365	21,984
Allowance for doubtful accounts, net of recoveries	(197)	727
Gain on dispositions of property and equipment, net	(2,298)	(717)
Reorganization items, net	0	988
Stock-based compensation expense	830	328
Phantom stock compensation expense	0	(3)
Amortization of debt issuance costs and discount	2,578	1,219
Interest paid in-kind	1,057	0
Loss on extinguishment of debt	83	0
Impairment	0	17,853
Deferred income taxes	1,370	1,115
Change in other noncurrent assets	64	690
Change in other noncurrent liabilities	(162)	(562)
Changes in current assets and liabilities:
Receivables	(3,386)	14,234
Inventory	548	834
Prepaid expenses and other current assets	1,548	(1,253)
Accounts payable	(816)	(4,114)
Deferred revenues	(195)	(342)
Commitment premium	0	9,584
Accrued expenses	2,211	1,148
Net cash used in operating activities	(342)	(5,391)
Cash flows from investing activities:
Purchases of property and equipment	(3,744)	(7,503)
Proceeds from sale of property and equipment	3,522	727
Net cash used in investing activities	(222)	(6,776)
Cash flows from financing activities:
Debt repayments	(1,270)	0
Proceeds from DIP Facility	0	4,000
DIP Facility issuance costs	0	(988)
Purchase of treasury stock	0	(7)
Net cash provided by (used in) financing activities	(1,270)	3,005
Net decrease in cash, cash equivalents and restricted cash	(1,834)	(9,162)
Beginning cash, cash equivalents, and restricted cash	32,329	25,617
Ending cash, cash equivalents, and restricted cash	30,495	16,455
Supplementary disclosure:
Interest Paid	1,203	4,306
Income tax paid	406	623
Reorganization items paid	521	2,322
Noncash investing and financing activity:
Change in capital expenditure accruals	$ 70	$ 358