Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash	$ 30,006	$ 4,913
Restricted cash	9,161	1,215
Trade accounts receivable, net	66,422	50,570
Receivable from affiliates	94	390
Contract assets	17,216	20,641
Inventory	9,234	14,792
Income tax receivable	650	1,374
Prepaid expenses and other current assets	7,445	4,615
Total current assets	140,228	98,510
Property and equipment, net	64,769	85,294
Goodwill	74,213	74,213
Intangible assets, net	86,106	92,473
Equity method investments	5,095	5,078
Other assets	1,157	188
Total assets	371,568	355,756
Current liabilities:
Accounts payable	22,414	25,510
Contract liabilities	12,061	582
Notes payable, current maturities	37,873	34,873
Asset retirement obligation, current portion	2,921	9,944
Purchase option liability	0	7,110
Accrued liabilities	45,023	35,490
Other current liabilities	1,021	1,116
Total current liabilities	121,313	114,625
Long-term liabilities:
Deferred tax liabilities	2,214	1,492
Contingent payments for acquisitions	11,624	11,481
Asset retirement obligation	4,026	5,187
Line of credit	25,667	19,000
Notes payable, less current maturities	148,986	150,698
Other liabilities	1,000	0
Total liabilities	314,830	302,483
Commitments and contingencies (see Note 15)
Mezzanine equity
Series A Preferred Stock — $0.01 par value; 50 shares authorized, 26 shares issued and outstanding as of September 30, 2020; aggregate liquidation preference of $27,878 as of September 30, 2020	25,536	0
Stockholders’ equity
Retained losses	(55,004)	(33,002)
Common Stock — $0.01 par value; 200,000 shares authorized, 29,986 and 29,624 shares issued and outstanding as of September 30, 2020 and December 31, 2019, respectively	300	296
Additional paid-in capital	84,970	85,187
Total stockholders’ equity	30,266	52,481
Non-controlling interest	936	792
Total equity	31,202	53,273
Total liabilities, mezzanine equity and stockholders’ equity	$ 371,568	$ 355,756