Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net loss	$ (4,101)	$ (2,016)
Adjustments to reconcile net loss to net cash provided by
Depreciation and amortization	15,119	17,203
Deferred financing cost amortization	631	620
Deferred income taxes	(760)	(1,180)
Stock-based compensation	1,207	1,302
Gain on sale of property and equipment	(177)	(606)
Change in operating assets and liabilities:
Accounts receivable	17,742	1,037
Income tax receivable	(2,202)	0
Inventory	(5)	779
Prepaid expenses and other	720	861
Costs and estimated earnings in excess of billings on uncompleted contracts	(1,853)	11,207
Accounts payable	(3,774)	(11,857)
Accrued liabilities	(1,989)	(5,469)
Income tax payable	(689)	(306)
Billings in excess of costs and estimated earnings on uncompleted contracts	252	(1,444)
Net cash provided by operating activities	20,121	10,131
Cash flows from investing activities:
Proceeds from sale of property and equipment	5,547	888
Contributions to CSV life insurance	(241)	(471)
TAS Acquistion Adjustment	0	(369)
Acquisition of TBC	(6,000)	0
Purchase of property and equipment	(3,689)	(12,513)
Net cash used in investing activities	(4,383)	(12,465)
Cash flows from financing activities:
Borrowings from Credit Facility	37,000	32,000
Payments made on borrowings from Credit Facility	(53,063)	(29,021)
Loan costs from Credit Facility	0	(486)
Exercise of stock options	940	8
Net cash (used in) provided by financing activities	(15,123)	2,501
Net change in cash and cash equivalents	615	167
Cash and cash equivalents at beginning of period	305	1,345
Cash and cash equivalents at end of period	920	$ 1,512
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	2,193
Taxes (net of refunds)	$ 1,067