Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net loss	$ (17,299)	$ (19,619)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	13,274	11,635
Loss on extinguishment of debt	8,603	0
Paid-in-kind interest on long-term debt	1,663	0
Amortization of debt issuance costs	214	342
Deferred income tax benefit	0	(6,389)
Loss on sale of fixed assets	281	1,305
Income from equity method investment	(622)	(1,217)
Distributions received from equity investment	849	1,059
Non-cash share-based compensation	1,470	1,007
(Gain) loss on interest rate swap	(30)	1,796
Interest accreted on contingent payments for acquisition	105	135
Increase (decrease) in cash due to changes in:
Trade accounts receivable	(6,220)	13,036
Contract assets and liabilities	15,280	(4,857)
Inventory	4,975	3,491
Accounts payable	(7,887)	4,452
Asset retirement obligation	(4,183)	(5,120)
Other assets and liabilities	(1,245)	(4,484)
Net cash provided by (used in) operating activities	9,228	(3,428)
Cash flows from investing activities:
Proceeds from the sale of equipment	155	1,507
Purchases of property and equipment	(1,604)	(11,491)
Net cash used in investing activities	(1,449)	(9,984)
Cash flows from financing activities:
Net proceeds from line of credit	5,500	15,375
Proceeds from long-term debt	15,781	9,994
Principal payments on long-term debt	(12,435)	(8,067)
Payments of debt issuance costs	(1,543)	0
Taxes paid related to net settlement of shares	(137)	(201)
Net proceeds from issuance of convertible Series A Preferred Stock	24,263	0
Distributions to non-controlling interest	(709)	(1,008)
Net cash provided by financing activities	30,720	16,093
Net increase in cash, cash equivalents and restricted cash	38,499	2,681
Cash, cash equivalents and restricted cash, beginning of period	6,128	6,900
Cash, cash equivalents and restricted cash, end of period	44,627	9,581
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	7,703	4,889
Cash refunded during the period for taxes	779	0
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	850	0
Shares issued under share-based compensation plans	$ 4	$ 0