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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income | $ 11,002 | $ 8,562
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 7,519 | 6,575
Stock-based compensation | 13,569 | 12,766
Inventory write-downs | 358 | 1,009
Deferred taxes | 475 | (953)
Other | (221) | 140
Changes in operating assets and liabilities: |  |
Accounts receivable | 8,460 | (3,540)
Inventories | (11,619) | (10,641)
Prepaid expenses and other current and non-current assets | 4,565 | (3,994)
Accounts payable | 5,209 | 2,074
Accrued expenses and other non-current liabilities | (1,022) | 1,131
Net cash provided by (used in) operating activities | 38,295 | 13,129
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Purchases of non-marketable investments | (10,000) | 0
Purchases of marketable investments | (11,267) | 0
Proceeds from maturities of marketable investments | 43,375 | 14,605
Purchases of property and equipment | (5,824) | (3,894)
Other | 2,100 | 0
Net cash provided by (used in) investing activities | 18,384 | 10,711
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from exercises of stock options | 238 | 2,209
Payment of employee taxes related to vested stock | (421) | (204)
Payments of finance lease obligations | (550) | (474)
Other | (61) | (155)
Net cash (used in) provided by financing activities | (794) | 1,376
Effect of foreign exchange rate changes on cash and cash equivalents | (257) | (386)
NET INCREASE IN CASH AND CASH EQUIVALENTS | 55,628 | 24,830
CASH AND CASH EQUIVALENTS—Beginning of period | 167,486 | 69,858
CASH AND CASH EQUIVALENTS—End of period | 223,114 | 94,688
NONCASH INVESTING AND FINANCING ACTIVITIES: |  |
Right-of-use assets obtained in exchange for lease obligations | 292 | 341
Right-of-use assets obtained in exchange for finance lease obligations | 17 | 68
Purchase of property and equipment funded through accounts payable and accrued liabilities | 1,816 | 1,781
SUPPLEMENTAL CASH FLOW INFORMATION: |  |
Cash paid for amounts included in the measurement of operating lease liabilities | 5,337 | 4,706
Cash paid for income taxes | $ 1,125 | $ 1,413

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