Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net loss	$ (2,016)	$ (2,102)
Adjustments to reconcile net loss to net cash provided by
Depreciation and amortization	17,203	10,654
Deferred financing cost amortization	620	0
Bad debt expense	0	11
Deferred income taxes	(1,180)	(1,160)
Stock-based compensation	1,302	1,315
Gain on sale of property and equipment	(606)	(100)
Change in operating assets and liabilities:
Accounts receivable	1,037	(11,135)
Income tax receivable	0	233
Inventory	779	(97)
Prepaid expenses and other	861	356
Costs and estimated earnings in excess of billings on uncompleted contracts	11,207	(932)
Accounts payable	(11,857)	6,282
Accrued liabilities	(5,469)	(946)
Income tax payable	(306)	(730)
Billings in excess of costs and estimated earnings on uncompleted contracts	(1,444)	(4,792)
Deferred revenue	0	(34)
Net cash provided by (used in) operating activities	10,131	(3,177)
Cash flows from investing activities:
Proceeds from sale of property and equipment	888	166
Contributions to CSV life insurance	(471)	0
TAS acquisition adjustment	(369)	0
Purchase of property and equipment	(12,513)	(7,533)
Net cash used in investing activities	(12,465)	(7,367)
Cash flows from financing activities:
Borrowings from Credit Facility	32,000	0
Payments made on borrowings from Credit Facility	(29,021)	(4,541)
Loan costs from Credit Facility	(486)	0
Exercise of stock options	8	28
Purchase of shares into treasury	0	(3,101)
Net cash provided by (used in) financing activities	2,501	(7,614)
Net change in cash and cash equivalents	167	(18,158)
Cash and cash equivalents at beginning of period	1,345	38,893
Cash and cash equivalents at end of period	1,512	20,735
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	2,588	490
Taxes (net of refunds)	$ 235	$ 434