Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 4,086	$ 3,800
Adjustments to reconcile net income to net cash provided by operating activities:
(Gain) loss on change in fair value of contingent consideration, net	(197)	159
Depreciation and amortization	1,443	1,765
Deferred Income Tax Expense (Benefit)	118	0
Non-cash compensation expense	1,458	1,496
Changes in other operating items:
Accounts and other receivables	5,753	4,644
Costs and estimated earnings in excess of billings on uncompleted contracts	(7,570)	3,914
Prepaid expenses and other current assets	(330)	(2,641)
Accounts payable and accrued expenses	(2,481)	(3,654)
Billings in excess of costs and estimated earnings on uncompleted contracts	2,047	(376)
Other	(209)	(544)
Net cash provided by operating activities	4,118	8,563
Cash flows from investing activities:
Additions to property, plant and equipment	(525)	(575)
Acquisitions, net of cash acquired	(3,193)	(2,330)
Other investing activities	(344)	13
Net cash used in investing activities	(4,062)	(2,892)
Cash flows from financing activities:
Proceeds from short-term borrowings	5,820	(992)
Repayment of long-term debt	(3,000)	(3,333)
Change in negative cash book balance	(2,313)	(1,659)
Repurchases of common stock in the open market	(1,674)	(4,291)
Other financing activities	(134)	0
Net cash used in financing activities	(1,301)	(10,275)
Effect of exchange rate changes on cash and cash equivalents	351	44
Net decrease in cash	(894)	(4,560)
Cash at beginning of period	16,346	21,030
Cash at end of period	15,452	16,470
Cash paid during the period for income taxes	$ 491	$ 2,594