Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net loss	$ (21,533)	$ (18,253)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	7,740	7,588
Non-cash lease expense	1,386
Deferred income taxes	20	17
Stock-based compensation	6,590	7,386
Other	118	67
Change in operating assets and liabilities, net of effect of acquisitions and disposals:
Accounts receivable, net	654	(812)
Prepaid expenses and other current assets	845	(665)
Other long-term assets	109	231
Operating lease ROU assets and liabilities	(1,695)
Accounts payable	2,034	(222)
Accrued expenses and other liabilities	(5,607)	731
Deferred revenue	594	8
Net cash used in operating activities	(8,745)	(3,924)
Cash flows from investing activities
Purchases of property and equipment	(5,167)	(5,062)
Purchases of intangible assets		(45)
Cash paid for acquisitions, net of cash acquired	(1,900)	(10,349)
Other		5
Net cash used in investing activities	(7,067)	(15,451)
Cash flows from financing activities
Proceeds from exercises of stock options and purchases under ESPP	726	1,470
Proceeds from issuance of common stock		23,367
Taxes paid on net share settlements of restricted stock units	(2,403)	(3,184)
Cash paid for acquisition holdback	(625)
Cash paid for contingent consideration liability	(934)	(905)
Other	(75)	(51)
Net cash (used in) provided by financing activities	(3,311)	20,697
Effect of foreign currency on cash, cash equivalents and restricted cash	(2)	42
Change in cash, cash equivalents and restricted cash	(19,125)	1,364
Cash, cash equivalents and restricted cash, beginning of period	31,935	32,300
Cash, cash equivalents and restricted cash, end of period	$ 12,810	$ 33,664