Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net (loss) income	$ (7,924)	$ 4,101
Adjustments to reconcile net (loss) income to net cash (used in) provided by
Depreciation and amortization	7,040	6,780
Deferred financing cost amortization	84	337
Deferred income taxes	34	1,117
Stock-based compensation	664	334
Gain on sale of property and equipment	(374)	(813)
Other gain from continuing operations	0	(5,448)
Change in operating assets and liabilities:
Accounts receivable	(9,296)	10,954
Notes receivable	104	0
Income tax receivable	(133)	(49)
Inventory	210	688
Prepaid expenses and other	151	(437)
Costs and estimated earnings in excess of billings on uncompleted contracts	(5,916)	3,300
Accounts payable	474	(9,505)
Accrued liabilities	(1,683)	(2,283)
Income tax payable	533	(19)
Billings in excess of costs and estimated earnings on uncompleted contracts	14,104	1,846
Other	0	(286)
Net cash (used in) provided by operating activities	(1,928)	10,617
Cash flows from investing activities:
Proceeds from sale of property and equipment	400	306
Purchase of property and equipment	(3,862)	(4,346)
Contributions to CSV life insurance	(301)	(146)
Proceeds from return of investment	0	93
Insurance claim proceeds related to property and equipment	0	1,150
Net cash used in investing activities	(3,763)	(2,943)
Cash flows from financing activities:
Borrowings from Credit Facility	11,000	0
Payments made on borrowings from Credit Facility	(10,750)	(8,375)
Loan costs from Credit Facility	43	0
Payments of finance lease liabilities	(696)	0
Exercise of stock options	35	816
Net cash used in financing activities	(368)	(7,559)
Net change in cash and cash equivalents	(6,059)	115
Cash and cash equivalents at beginning of period	8,684	9,086
Cash and cash equivalents at end of period	2,625	9,201
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	1,190	1,163
Taxes, net of refunds	$ 151	$ 25