Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net (loss) income	$ (9,557)	$ 6,350
Adjustments to reconcile net (loss) income to net cash (used in) provided by
Depreciation and amortization	13,108	14,211
Amortization of ROU operating leases	2,927	0
Amortization of ROU finance leases	1,154	0
Unamortized debt issuance costs upon debt modification	399	0
Amortization of deferred debt issuance costs	186	646
Deferred income taxes	43	1,841
Stock-based compensation	1,728	1,151
Gain on sale of property and equipment	(746)	(1,499)
Other gain from continuing operations	0	(5,448)
Change in operating assets and liabilities:
Accounts receivable	(28,257)	8,983
Notes receivable	264	0
Income tax receivable	(398)	91
Inventory	252	588
Prepaid expenses and other	(138)	1,482
Costs and estimated earnings in excess of billings on uncompleted contracts	(14,424)	(7,282)
Accounts payable	6,261	(6,952)
Accrued liabilities	(1,601)	(962)
Operating lease liabilities	(2,896)	0
Income tax payable	409	449
Billings in excess of costs and estimated earnings on uncompleted contracts	30,204	(8,854)
Other	0	(286)
Net cash (used in) provided by operating activities	(1,082)	4,509
Cash flows from investing activities:
Proceeds from sale of property and equipment	847	1,070
Purchase of property and equipment	(8,118)	(11,911)
Contributions to CSV life insurance	(444)	(266)
Proceeds from return of investment	0	94
Insurance claim proceeds related to property and equipment	2,574	1,150
Net cash used in investing activities	(5,141)	(9,863)
Cash flows from financing activities:
Borrowings from Credit Facility	32,000	13,000
Payments made on borrowings from Credit Facility	(29,500)	(11,750)
Loan costs from Credit Facility	(825)	0
Payments of finance lease liabilities	(1,412)	0
Exercise of stock options	35	1,299
Net cash provided by financing activities	298	2,549
Net change in cash and cash equivalents	(5,925)	(2,805)
Cash and cash equivalents at beginning of period	8,684	9,086
Cash and cash equivalents at end of period	2,759	6,281
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	3,926	2,055
Taxes, net of refunds	$ 394	$ 404