Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities
Net income (loss)	$ 1,587	$ (1,858)
Adjustments to reconcile net loss to net cash provided by
Depreciation and amortization	17,631	16,187
Deferred financing cost amortization	0	53
Bad debt expense (recoveries)	261	(2)
Deferred income taxes	0	(2,639)
Stock-based compensation	1,098	1,636
Loss on sale of property and equipment	(165)	(59)
Change in operating assets and liabilities:
Accounts receivable	918	1,078
Income tax receivable	0	195
Inventory	(1,257)	(1,105)
Prepaid expenses and other	1,038	1,803
Costs and estimated earnings in excess of billings on uncompleted contracts	(13,815)	(5,901)
Accounts payable	5,188	(4,877)
Accrued liabilities	4,765	(1,122)
Income tax payable	703	519
Billings in excess of costs and estimated earnings on uncompleted contracts	1,354	(1,726)
Deferred revenue	(44)	(43)
Net cash provided by operating activities	19,262	2,139
Cash flows from investing activities:
Proceeds from sale of property and equipment	441	191
Purchase of land	22,199	0
Purchase of property and equipment	(18,131)	(11,751)
Net cash used in investing activities	(39,889)	(11,560)
Cash flows from financing activities:
Borrowings from Credit Facility	26,000	0
Contribution from non controlling interest	0	33
Payments made on borrowings from Credit Facility	(1,168)	(3,278)
Exercise of stock options	794	737
Net cash provided by (used in) financing activities	25,626	(2,508)
Net change in cash and cash equivalents	4,999	(11,929)
Cash and cash equivalents at beginning of period	40,859	43,084
Cash and cash equivalents at end of period	45,858	31,155
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	459	393
Taxes (net of refunds)	$ 262	$ (267)