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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:      
Net loss $ (150,920) $ (88,641) $ (33,477)
Adjustments to reconcile net loss to net cash used by operating activities:      
Stock-based compensation 38,830 23,844 15,279
Depreciation and amortization of intangible assets 7,297 5,743 5,851
Bad debt expense 1,298 410 984
Amortization of debt issuance costs 43 0 0
Loss on disposal of property and equipment 3 79 22
Change in fair value of available-for-sale securities 0 0 22
Deferred income taxes (1,089) (498) (184)
Changes in assets and liabilities:      
Accounts receivable (37,922) (33,904) (33,559)
Prepaid expenses and other assets (2,027) 2,094 3,740
Deferred commissions (12,298) (21,588) (8,575)
Accounts payable and accrued expenses (3,289) 11,467 (4,238)
Accrued compensation and related benefits 6,582 12,598 11,801
Other current and non-current liabilities (264) (444) 3,681
Deferred revenue 47,534 33,378 27,626
Operating lease assets and liabilities (329) 1,544 3,407
Net cash used by operating activities (106,551) (53,918) (7,620)
Cash flows from investing activities:      
Proceeds from investments 84,642 120,593 0
Purchases of investments (65,283) (41,870) (145,968)
Purchases of property and equipment (9,095) (6,058) (1,251)
Payments for acquisitions, net of cash acquired 0 (30,729) (6,138)
Net cash provided by (used by) investing activities 10,264 41,936 (153,357)
Cash flows from financing activities:      
Proceeds from borrowings 120,000 0 0
Payments for debt issuance costs (1,940) 0 0
Debt repayments (625) 0 0
Proceeds from exercise of common stock options 25,432 2,786 6,376
Proceeds from public offerings, net of underwriting discounts 0 0 108,260
Payments of costs related to public offerings 0 0 (346)
Principal payments on finance leases 0 0 (3,822)
Net cash provided by financing activities 142,867 2,786 110,468
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash (159) 694 3,216
Net increase (decrease) in cash, cash equivalents, and restricted cash 46,421 (8,502) (47,293)
Cash, cash equivalents, and restricted cash at beginning of period 103,960 112,462 159,755
Cash, cash equivalents, and restricted cash at end of period 150,381 103,960 112,462
Supplemental cash flow information:      
Cash paid for interest 1,671 323 165
Cash paid for income taxes 1,239 1,505 1,182
Supplemental non-cash investing and financing information:      
Accrued capital expenditures $ 1,774 $ 379 $ 0