Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Cash flows from operating activities:
Net income	$ 20,247	$ 18,789	$ 27,098
Adjustments to reconcile net income to net cash provided by operating activities:
Loss (gain) on change in fair value of contingent consideration, net	136	371	(1,392)
Depreciation and amortization	6,462	7,865	9,758
Non-cash compensation expense	6,015	6,059	4,823
Deferred income taxes	(1,761)	(1,096)	(113)
Changes in other operating items, net of acquired amounts:
Accounts and other receivables	(17,965)	6,497	(6,024)
Costs and estimated earnings in excess of billings on uncompleted contracts	4,234	(16,942)	(8,291)
Prepaid expenses and other current assets	(2,490)	5,111	(1,967)
Accounts payable and accrued expenses	3,732	3,856	8,794
Billings in excess of costs and estimated earnings on uncompleted contracts	383	(4,663)	1,416
Income tax benefit from stock-based compensation	(137)	(835)	(2,506)
Contingent consideration payments in excess of fair value on acquisition date	(539)	(325)	(1,043)
Other	(240)	867	445
Net cash provided by operating activities	18,077	25,554	30,998
Cash flows from investing activities:
Additions to property, plant and equipment	(1,402)	(2,357)	(2,757)
Acquisitions, net of cash acquired	(6,801)	0	(8,670)
Payments to Acquire Interest in Joint Venture	(1,600)	0	0
Payments to Develop Software	(933)	0	0
Other investing activities	14	186	246
Net cash used in investing activities	(10,722)	(2,171)	(11,181)
Cash flows from financing activities:
Proceeds from (repayment of) short-term borrowings	(16,127)	13,285	20,392
Proceeds from long-term debt	40,000	0	40,000
Repayment of long-term debt	(24,444)	(13,333)	(2,223)
Contingent consideration payments	(2,244)	(2,284)	(977)
Change in negative cash book balance	1,366	(1,143)	(440)
Repurchases of common stock	(8,747)	(11,559)	(66,640)
Income tax benefit from stock-based compensation	137	835	2,506
Tax withholding payments for employee stock-based compensation in exchange for shares surrendered	(771)	(1,451)	(3,407)
Proceeds from issuance of common stock	145	148	102
Other financing activities	(97)	(10)	(5)
Net cash used in financing activities	(10,782)	(15,512)	(10,692)
Effect of exchange rate changes on cash	(1,257)	(1,382)	(231)
Net change in cash	(4,684)	6,489	8,894
Cash at beginning of year	21,030	14,541	5,647
Cash at end of year	16,346	21,030	14,541
Cash paid during the year for:
Interest	1,523	1,383	583
Income taxes	10,604	8,273	17,439
Non-cash financing activities:
Accrued share repurchases	0	788	0
Accrued contingent consideration	$ 5,166	$ 0	$ 5,345