Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
OPERATING ACTIVITIES:
Net (loss) income	$ (22,246,000)	$ 712,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	15,819,000	13,180,000
Provision for credit loss	114,000	205,000
Amortization of debt discount and issuance costs	829,000	5,631,000
Stock-based compensation expense	39,814,000	20,296,000
Deferred income taxes	(64,000)	(1,000)
Gain on mark-to-market adjustment of contingent consideration	(5,304,000)	0
Expense on repurchase of convertible senior notes	16,621,000	0
Other, net	115,000	34,000
Changes in assets and liabilities:
Accounts receivable	29,270,000	24,852,000
Prepaid expenses and other current assets	2,056,000	(3,367,000)
Other long-term assets	4,397,000	(5,067,000)
Accounts payable	(2,070,000)	(967,000)
Accrued compensation and benefits	(9,742,000)	1,548,000
Other accrued expenses and current liabilities	(61,648,000)	2,999,000
Deferred revenue	10,080,000	(5,333,000)
Net cash provided by operating activities	18,041,000	54,722,000
INVESTING ACTIVITIES:
Payments for acquisition of businesses, net of cash acquired	(37,660,000)	0
Capital expenditures	(3,457,000)	(5,391,000)
Other investing activities, net	(322,000)	(389,000)
Net cash used in investing activities	(41,439,000)	(5,780,000)
FINANCING ACTIVITIES:
Proceeds from issuance of convertible senior notes, net of underwriters' discounts and commissions	224,265,000	0
Repurchase of convertible senior notes	(192,792,000)	0
Proceeds from employee stock purchase plan contributions	4,431,000	0
Repurchase and retirement of common stock	(4,387,000)	0
Proceeds from the exercise of common stock options	1,689,000	885,000
Payments of debt issuance costs	(1,157,000)	0
Payments on revolving commitment	0	(30,000,000)
Other financing activities	(131,000)	(206,000)
Net cash provided by (used in) financing activities	31,918,000	(29,321,000)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(6,226,000)	(847,000)
Net increase in cash, cash equivalents and restricted cash	2,294,000	18,774,000
Cash, cash equivalents and restricted cash at beginning of year	414,012,000	241,547,000
Cash, cash equivalents and restricted cash at end of period	416,306,000	260,321,000
Supplemental disclosure of cash flow:
Interest paid	289,000	339,000
Income taxes paid	4,891,000	3,744,000
Supplemental disclosure of non-cash investing and financing activities:
Property and equipment in accounts payable, other current liabilities and other liabilities	$ 1,530,000	$ 631,000