Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 9,836	$ 12,891	$ 20,247
Adjustments to reconcile net income to net cash provided by operating activities:
(Gain) loss on change in fair value of contingent consideration, net	(4,438)	(1,620)	136
Depreciation and amortization	7,921	6,974	6,462
Non-cash compensation expense	4,310	6,314	6,015
Deferred income taxes	876	(313)	(1,761)
Changes in other operating items, net of acquired amounts:
Accounts and other receivables	23,092	(10,977)	(17,965)
Unbilled revenue	(36,868)	(1,893)	4,234
Prepaid expenses and other current assets	705	(2,297)	(2,490)
Accounts payable and accrued expenses	8,110	15,392	3,732
Deferred revenue	(2,094)	2,520	383
Income tax benefit from stock-based compensation	0	0	(137)
Contingent consideration payments in excess of fair value on acquisition date	0	(408)	(539)
Other	(240)	(323)	(240)
Net Cash Provided by (Used in) Operating Activities	11,210	26,260	18,077
Cash flows from investing activities:
Additions to property, plant and equipment	(2,834)	(2,734)	(1,402)
Acquisitions, net of cash acquired	(55,290)	(11,111)	(6,801)
Investment in joint venture	0	0	(1,600)
Capitalized software development costs	(3,544)	(1,313)	(933)
Other investing activities	(86)	(295)	14
Net Cash Provided by (Used in) Investing Activities	(61,754)	(15,453)	(10,722)
Cash flows from financing activities:
Proceeds from (repayment of) short-term borrowings	(37,577)	19,864	(16,127)
Proceeds from long-term debt	146,000	0	40,000
Repayment of long-term debt	(57,500)	(12,000)	(24,444)
Contingent consideration payments	0	(4,657)	(2,244)
Change in negative cash book balance	(1,278)	(2,138)	1,366
Repurchases of common stock	(8,522)	(3,773)	(8,747)
Tax withholding payments for employee stock-based compensation in exchange for shares surrendered	(416)	(1,168)	(771)
Premium paid on interest rate cap	0	(474)	0
Cash proceeds from termination of interest rate derivatives	544	0	0
Payment of debt issuance costs	(1,231)	0	0
Other financing activities	10	120	185
Net Cash Provided by (Used in) Financing Activities	40,030	(4,226)	(10,782)
Effect of exchange rate changes on cash	319	685	(1,257)
Net change in cash	(10,195)	7,266	(4,684)
Cash at beginning of year	23,612	16,346	21,030
Cash at end of year	13,417	23,612	16,346
Cash paid during the year for:
Interest	3,741	1,841	1,523
Income taxes	4,528	6,256	10,604
Non-cash financing activities:
Accrued share repurchases	(529)	529	0
Accrued contingent consideration	$ 905	$ 5,613	$ 5,166