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	$ (37,272)	$ (144,881)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities
Depreciation and amortization	10,797	14,765
Goodwill and other long-lived asset impairments	7,277	97,115
Loss on derivative	4,798	3,552
Inventory write-downs	0	4,846
Accretion of asset retirement obligations	468	467
Provision for expected credit losses, net of recoveries	(576)	1,567
Amortization of debt discounts and debt issuance costs	2,273	1,108
Stock-based compensation	52	1,336
Loss (gain) on disposal of assets	(2,544)	2,619
Deferred income taxes	(262)	(3,674)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	7,081	17,473
Inventories	170	700
Prepaid expenses and other assets	166	(1,800)
Accounts payable	3,432	(5,839)
Accrued expenses	12,277	9,702
Other liabilities	(464)	(1,770)
Net cash provided by (used in) operating activities	7,673	(2,714)
Cash flows from investing activities:
Capital expenditures	(331)	(5,595)
Proceeds from sale of assets	5,460	40,274
Payments to acquire business, net of cash acquired	0	(59,350)
Net cash provided by (used in) investing activities	5,129	(24,671)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0	23,000
Repayments of long-term debt	(2,385)	(8,999)
Repurchases of common stock	0	(6)
Payments of debt issuance costs	0	(225)
Other financing activities	0	(1,525)
Net cash provided by (used in) financing activities	(2,385)	12,245
Net increase (decrease) in cash, cash equivalents and restricted cash	10,417	(15,140)
Cash, cash equivalents and restricted cash - beginning of period	9,985	36,217
Cash, cash equivalents and restricted cash - end of period	20,402	21,077
Supplemental cash flow information and non-cash investing and financing activities:
Interest paid	1,570	1,229
Income taxes paid, net of refunds	(5)	(119)
Fair value of long-term debt issued to settle derivative obligation	9,500	0
Operating lease liabilities incurred from obtaining right-of-use assets	719	1,007
Finance lease liabilities incurred from obtaining right-of-use assets	0	498
Capital expenditures included in accounts payable	(87)	(1,594)
Issuance of Series A Participating Preferred Stock	0	22,000
Recognition of derivative liability	$ 0	$ 9,713