Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net loss	$ (20,822)	$ (21,922)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	13,196	17,034
Loss on extinguishment of debt	8,603	0
Impairment expense	6,399	0
Paid-in-kind interest on long-term debt	3,093	0
Amortization of debt issuance costs	396	520
Deferred income tax expense (benefit)	608	(7,503)
Loss on sale of fixed assets	581	1,732
Income from equity method investment	(1,247)	(1,884)
Distributions received from equity investment	1,230	1,650
Non-cash share-based compensation	2,084	1,666
(Gain) loss on interest rate swap	(95)	2,098
Interest accreted on contingent payments for acquisition	143	203
Increase (decrease) in cash due to changes in:
Trade accounts receivable	(15,852)	(7,330)
Contract assets and liabilities	14,904	74,201
Inventory	5,477	10,310
Accounts payable	(3,740)	4,754
Asset retirement obligation	(7,905)	(8,298)
Other assets and liabilities	3,846	2,944
Net cash provided by operating activities	10,899	70,175
Cash flows from investing activities:
Proceeds from the sale of equipment	698	1,672
Purchases of property and equipment	(3,556)	(13,672)
Net cash used in investing activities	(2,858)	(12,000)
Cash flows from financing activities:
Net proceeds from (payments on) line of credit	6,667	(9,584)
Proceeds from long-term debt	18,353	16,907
Principal payments on long-term debt	(21,479)	(62,603)
Payments of debt issuance costs	(1,623)	0
Taxes paid related to net settlement of shares	(137)	(201)
Net proceeds from issuance of convertible Series A Preferred Stock	24,253	0
Distributions to non-controlling interest	(1,036)	(2,008)
Net cash provided by (used in) financing activities	24,998	(57,489)
Net increase in cash, cash equivalents and restricted cash	33,039	686
Cash, cash equivalents and restricted cash, beginning of period	6,128	6,900
Cash, cash equivalents and restricted cash, end of period	39,167	7,586
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	10,349	8,562
Cash (refunded) paid during the period for taxes	(779)	91
Non-cash investing and financing transactions:
Changes in property and equipment included in accounts payables and accrued expenses	676	0
Sale of equipment through the issuance of a note receivable	1,450	0
Series A Preferred Stock dividends payable included in accrued expenses	877	0
Shares issued under share-based compensation plans	$ 4	$ 0