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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities: |  |  |
Net loss | $ (116,554) | $ (175,357) | $ (145,215)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 22,270 | 18,503 | 14,757
Stock-based compensation expense | 109,570 | 110,785 | 91,183
(Accretion) amortization of marketable securities | (13,811) | (895) | 501
Impairment of long-lived assets | 3,062 | 6,124 | 0
Other | 1,496 | 1,088 | (448)
Changes in operating assets and liabilities: |  |  |
Accounts receivable, net | (14,763) | (20,598) | 5,863
Prepaid expenses and other assets | (17,003) | (18,290) | (5,697)
Operating lease right-of-use assets | 4,868 | 4,839 | 5,301
Accounts payable and accrued expenses | 33,971 | 17,893 | 16,322
Accrued compensation and other liabilities | 3,073 | 3,409 | 7,670
Operating lease liabilities | (7,853) | (5,841) | (6,336)
Deferred revenue | 21,313 | 20,289 | 17,845
Net cash provided by (used in) operating activities | 29,639 | (38,051) | 1,746
Cash flows from investing activities: |  |  |
Purchases of marketable securities | (121,756) | (593,770) | (241,758)
Proceeds from maturities of marketable securities | 530,000 | 375,000 | 204,981
Purchases of property, equipment, and software | (1,147) | (1,578) | (1,554)
Capitalized internal-use software costs | (15,254) | (12,299) | (12,090)
Purchase of minority interest | (1,701) | 0 | 0
Purchases of content assets | (5,344) | (1,377) | (1,188)
Net cash provided by (used in) investing activities | 384,798 | (234,024) | (51,609)
Cash flows from financing activities: |  |  |
Proceeds from exercise of stock options | 27,315 | 17,586 | 31,766
Proceeds from employee stock purchase plan | 6,031 | 6,829 | 6,397
Proceeds from initial public offering, net of offering costs | 0 | 0 | 525,284
Payments for repurchases of common stock | (58,453) | 0 | 0
Payment of tax withholding on vesting of restricted stock units | (54,122) | (11,886) | (7,172)
Payment of deferred offering costs | 0 | (295) | (6,119)
Net cash (used in) provided by financing activities | (79,229) | 12,234 | 550,156
Net increase (decrease) in cash, cash equivalents, and restricted cash | 335,208 | (259,841) | 500,293
Cash, cash equivalents, and restricted cash—Beginning of period | 322,878 | 582,719 | 82,426
Cash, cash equivalents, and restricted cash—End of period | 658,086 | 322,878 | 582,719
Supplemental disclosure of cash flow information: |  |  |
Cash paid for income taxes | 6,383 | 4,064 | 2,837
Supplemental disclosure of noncash investing and financing activities: |  |  |
Stock-based compensation capitalized as internal-use software costs | 7,055 | 5,407 | 4,890
Unpaid deferred offering costs | $ 0 | $ 0 | $ 295

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