Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES:
Net loss	$ (7,397)	$ (12,698)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	19,355	16,916
Provision for credit loss	330	930
Amortization of debt discount and issuance costs	8,513	8,067
Stock-based compensation expense	31,229	13,939
Deferred income taxes	(510)	(5,441)
Other, net	40	13
Changes in assets and liabilities:
Accounts receivable	26,770	16,213
Prepaid expenses and other current assets	(7,612)	(1,055)
Other long-term assets	(5,018)	867
Accounts payable	(2,432)	(3,321)
Accrued compensation and benefits	481	1,274
Other accrued expenses and current liabilities	483	(5,873)
Deferred revenue	(8,638)	(2,452)
Net cash provided by operating activities	55,594	27,379
INVESTING ACTIVITIES:
Capital expenditures	(6,811)	(4,006)
Payments for acquisition of businesses, net of cash acquired	(5,472)	(32,279)
Payments for acquisition of developed technology	(344)	(433)
Other investing activities, net	(284)	152
Net cash used in investing activities	(12,911)	(36,566)
FINANCING ACTIVITIES:
Proceeds from private placement of common stock	200,000
Payments on revolving commitment	(30,000)
Proceeds from employee stock purchase plan contributions	2,110
Proceeds from the exercise of common stock options	2,059	1,094
Borrowings under revolving commitment		30,000
Other financing activities	(434)	(401)
Net cash provided by financing activities	173,735	30,693
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,951)	676
Net increase in cash, cash equivalents and restricted cash	214,467	22,182
Cash, cash equivalents and restricted cash at beginning of year	241,547	223,497
Cash, cash equivalents and restricted cash at end of period	456,014	245,679
Supplemental disclosure of cash flow:
Interest paid	344	320
Income taxes paid	8,077	12,142
Supplemental disclosure of non-cash investing and financing activities:
Finance leases		117
Property and equipment in accounts payable, other current liabilities and other liabilities	$ 480	$ 208