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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Operating activities |  |
Net loss | $ (17,277) | $ (116,328)
Adjustments to reconcile net loss to net cash provided by operating activities |  |
Stock-based compensation | 89,357 | 87,425
Depreciation and amortization | 40,894 | 34,210
Accretion of discounts on marketable debt securities, net | (6,749) | (3,662)
Abandonment of long-lived assets | 580 | 535
Noncash operating lease expense | 4,993 | 5,232
Unrealized foreign currency loss, net | 714 | 557
Deferred income taxes | 2 | 5
Provision for credit losses | 405 | 3,730
(Increase) decrease in fair value of strategic investments | (641) | 6
Changes in operating assets and liabilities, net of effect of asset acquisitions and business combinations |  |
Accounts receivable | 48,994 | 23,577
Deferred contract cost assets | (2,089) | (3,630)
Prepaid expenses and other assets | (190) | 1,701
Accounts payable | 13,279 | 1,149
Accrued expenses and other liabilities | (30,447) | (31,110)
Deferred revenue | (10,877) | 19,582
Operating lease liabilities | (3,108) | (5,381)
Net cash provided by operating activities | 127,840 | 17,598
Investing activities |  |
Purchases of property and equipment | (3,963) | (4,694)
Capitalized software development costs | (19,732) | (17,351)
Purchases of strategic investments | (1,072) | (442)
Purchases of marketable securities | (324,374) | (229,282)
Maturities of marketable securities | 226,099 | 222,726
Sales of marketable securities | 0 | 5,452
Originations of materials financing | 0 | (17,007)
Customer repayments of materials financing | 1,483 | 12,996
Acquisition of a business, net of cash acquired | (25,945) | 0
Asset acquisitions, net of cash acquired | (3,792) | 0
Net cash used in investing activities | (151,296) | (27,602)
Financing activities |  |
Proceeds from stock option exercises | 9,915 | 10,939
Proceeds from employee stock purchase plan | 13,187 | 13,006
Principal payments under finance lease agreements, net of proceeds from lease incentives | (669) | (930)
Net cash provided by financing activities | 22,433 | 23,015
Net increase in cash and cash equivalents | (1,023) | 13,011
Effect of exchange rate changes on cash | (528) | (309)
Cash and cash equivalents, beginning of period | 357,790 | 299,816
Cash and cash equivalents, end of period | 356,239 | 312,518
Supplemental disclosure of cash flow information |  |
Cash paid for income taxes, net of refunds received | 1,635 | 685
Stock-based compensation capitalized for cloud-computing arrangement costs | 72 | 155
Cash received for lease incentives | 294 | 386
Operating cash flows from finance leases | 793 | 987
Operating cash flows from operating leases | 4,374 | 6,389
Financing cash flows from finance leases | 908 | 1,016
Noncash investing and financing activities: |  |
Purchases of property and equipment included in accounts payable and accrued expenses at period end | 1,582 | 698
Capitalized software development costs included in accounts payable and accrued expenses at period end | 3,287 | 749
Stock-based compensation capitalized for software development | 5,882 | 4,128
Deferred business combination payment included in other current liabilities at period end | 1,460 | 0
Deferred asset acquisition payment included in other current liabilities and accrued expenses at period end | 1,481 | 0
Right of use assets obtained or modified in exchange for operating lease liabilities | $ (3,780) | $ 3,515

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