Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Cash Flows from Operating Activities:
Net income	$ 623	$ 1,817
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	436	598
Share-based compensation expense	125	92
Non cash change in note receivable	(635)	(49)
Changes in current assets and liabilities, net of acquisitions:
Trade accounts receivable	2,520	(566)
Costs and estimated earnings in excess of billings on uncompleted contracts	(260)	(897)
Prepaid expenses and other assets	164	349
Accounts payable	(1,658)	1,894
Accrued compensation and benefits	425	1,458
Billings in excess of costs and estimated earnings on uncompleted contracts	(1,506)	(2,092)
Income taxes payable	(78)	0
Other, net	(856)	(549)
Net cash provided by (used in) operating activities	(700)	2,055
Cash Flows from Investing Activities:
Proceeds from notes receivable	983	0
Property and equipment acquired	(313)	(60)
Net cash provided by (used in) investing activities	670	(60)
Cash Flows from Financing Activities:
Debt issuance costs	(4)	0
Payments on capitalized leases	(150)	(420)
Net cash used in financing activities	(154)	(420)
Net change in cash	(184)	1,575
Cash and cash equivalents, at beginning of period	6,213	3,955
Cash and cash equivalents, at end of period	6,029	5,530
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	58	76
Cash paid during the period for income taxes (net of refunds)	170	0
Supplemental disclosure of noncash investing activities:
Property and equipment purchased through capital lease assignment	$ 168	$ 0