Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (1,208)	$ (258)
Adjustments to reconcile net loss to net cash provided by
Depreciation and amortization	8,550	5,445
Deferred financing cost amortization	303	0
Bad debt expense	0	1
Deferred income taxes	(707)	144
Stock-based compensation	433	788
Gain on sale of property and equipment	(372)	(44)
Change in operating assets and liabilities:
Accounts receivable	(3,370)	10,768
Income tax receivable	0	232
Inventory	310	(236)
Prepaid expenses and other	(307)	185
Costs and estimated earnings in excess of billings on uncompleted contracts	11,116	(2,883)
Accounts payable	(13,262)	1,427
Accrued liabilities	(4,277)	(2,383)
Income tax payable	(44)	(485)
Billings in excess of costs and estimated earnings on uncompleted contracts	(522)	(7,192)
Deferred revenue	0	(19)
Net cash (used in) provided by operating activities	(3,357)	5,490
Cash flows from investing activities:
Proceeds from sale of property and equipment	634	52
Contributions to CSV life insurance	(132)	0
Purchase of property and equipment	(7,231)	(5,712)
Net cash used in investing activities	(6,729)	(5,660)
Cash flows from financing activities:
Borrowings from Credit Facility	22,000	0
Payments made on borrowings from Credit Facility	(11,688)	(4,017)
Exercise of stock options	8	28
Net cash provided by (used in) financing activities	10,320	(3,989)
Net change in cash and cash equivalents	234	(4,159)
Cash and cash equivalents at beginning of period	1,345	38,893
Cash and cash equivalents at end of period	1,579	34,734
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	1,154	238
Taxes (net of refunds)	$ 1	$ (33)