Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ 6,350	$ (4,101)
Adjustments to reconcile net income (loss) to net cash provided by (used in):
Depreciation and amortization	14,211	15,119
Deferred financing cost amortization	646	631
Deferred income taxes	1,841	(760)
Stock-based compensation	1,151	1,207
Gain on sale of property and equipment	(1,499)	(177)
Other gain from continuing operations	(5,448)	0
Change in operating assets and liabilities:
Accounts receivable	8,983	17,742
Income tax receivable	91	(2,202)
Inventory	588	(5)
Prepaid expenses and other	1,482	720
Costs and estimated earnings in excess of billings on uncompleted contracts	(7,282)	(1,853)
Accounts payable	(6,952)	(3,774)
Accrued liabilities	(962)	(1,989)
Income tax payable	449	(689)
Billings in excess of costs and estimated earnings on uncompleted contracts	(8,854)	252
Other	(286)	0
Net cash provided by operating activities	4,509	20,121
Cash flows from investing activities:
Proceeds from sale of property and equipment	1,070	5,547
Purchase of property and equipment	(11,911)	(3,689)
Contributions to CSV life insurance	(266)	(241)
Acquisition of TBC	0	(6,000)
Proceeds from return of investment	94	0
Insurance claim proceeds related to property and equipment	1,150	0
Net cash used in investing activities	(9,863)	(4,383)
Cash flows from financing activities:
Borrowings from Credit Facility	13,000	37,000
Payments made on borrowings from Credit Facility	(11,750)	(53,063)
Exercise of stock options	1,299	940
Net cash provided by (used in) financing activities	2,549	(15,123)
Net change in cash and cash equivalents	(2,805)	615
Cash and cash equivalents at beginning of period	9,086	305
Cash and cash equivalents at end of period	6,281	920
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	2,055	2,193
Taxes, net of refunds	$ 404	$ 1,067