Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net loss	$ (18,253)	$ (25,800)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	7,588	8,815
Deferred income taxes	17	68
Stock-based compensation	7,386	6,426
Other	67	(44)
Change in operating assets and liabilities, net of effect of acquisitions and disposals:
Accounts receivable, net	(812)	319
Prepaid expenses and other current assets	(665)	1,021
Other long-term assets	231	25
Accounts payable	(222)	(548)
Accrued expenses and other liabilities	731	(1,557)
Deferred revenue	8	(236)
Net cash used in operating activities	(3,924)	(11,511)
Cash flows from investing activities
Purchases of property and equipment	(5,062)	(3,718)
Purchases of intangible assets	(45)	(235)
Cash received from disposal of businesses and online properties, net of cash disposed		4,285
Cash paid for acquisitions, net of cash acquired	(10,349)	(6,304)
Restricted deposits		606
Other	5	6
Net cash used in investing activities	(15,451)	(5,360)
Cash flows from financing activities
Proceeds from exercises of stock options and purchases under ESPP	1,470	1,941
Repurchases of common stock		(65)
Proceeds from issuance of common stock	23,367
Taxes paid on net share settlements of restricted stock units	(3,184)	(2,761)
Cash paid for acquisition holdback		(119)
Cash paid for contingent consideration liability	(905)
Other	(51)	(49)
Net cash provided by (used in) financing activities	20,697	(1,053)
Effect of foreign currency on cash, cash equivalents and restricted cash	42	(38)
Change in cash, cash equivalents and restricted cash	1,364	(17,962)
Cash, cash equivalents and restricted cash, beginning of period	32,300	51,957
Cash, cash equivalents and restricted cash, end of period	$ 33,664	33,995
Supplemental disclosure of cash flows
Stock issued for acquisitions		$ 1,603