CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net (loss) income	$ (2,098)	$ (6,378)	$ 4,954
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	3,207	1,903	1,760
Amortization of intangible assets	9,514	5,966	5,323
Deferred tax expense from stock issuances	333	147	(310)
Amortization of deferred financing costs	884	302	141
Loss on sublease	578
Stock-based compensation	7,439	7,047	5,049
Change in fair value of contingent consideration	145	(210)	468
Changes in accounts receivable allowance	351	34	174
Deferred tax benefit	(1,008)	(1,904)	(1,958)
Loss on disposal of fixed assets	19		3
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(6,028)	2,068	(7,506)
Prepaid expense and other assets	1,545	(714)	(1,820)
Accounts payable	(2,381)	1,732	(612)
Deferred revenue	(387)	1,409	(372)
Debt issuance costs	(38)	(2,730)
Accrued expenses	(631)	3,687	3,016
Net cash provided by operating activities	11,444	12,359	8,310
Cash flows from investing activities
Acquisitions, net of cash acquired	(889)	(55,187)	(537)
Restricted cash	403	(103)	(30)
Purchase of furniture, fixtures and equipment	(3,169)	(2,359)	(1,378)
Net cash used in investing activities	(3,655)	(57,649)	(1,945)
Cash flows from financing activities
Proceeds from debt		72,281
Proceeds from issuance of common stock		12,000
Principal payments on borrowings	(8,540)	(4,850)	(2,591)
Proceeds from issuance of ESPP shares	672	561	581
Payment of contingent consideration	(2,665)	(3,854)	(2,322)
Installment payment for acquisitions	(543)		(661)
Dividend paid			(5,189)
Payments related to tax withholding for stock-based compensation	(2,210)	(1,700)	(1,497)
Debt issuance costs		(137)
Tax expense from stock issuances		(147)	310
Equity securities repurchased	(2,853)	(11,565)	(3,381)
Net cash (used in) provided by financing activities	(16,139)	62,589	(14,750)
Effect of exchange rate changes on cash	2,285	(649)	(1,442)
Net (decrease) increase in cash and cash equivalents	(6,065)	16,650	(9,827)
Cash and cash equivalents, beginning of period	34,485	17,835	27,662
Cash and cash equivalents, end of period	28,420	34,485	17,835
Cash paid for:
Interest	5,596	1,926	1,464
Taxes, net of refunds	2,440	$ 5,714	4,526
Non-cash investing and financing activities:
Issuance of common stock for acquisition		10,944
Issuance of treasury stock for vested restricted stock awards	$ 7,100	$ 5,767	$ 4,913