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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities: |  |  |
Net income | $ 8,780 | $ 28,466 | $ 33,751
Adjustments required to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 2,596 | 2,984 | 2,432
Amortization of marketable securities premiums and accretion of discounts, net | 1,348 | 1,513 | 1,589
Share-based compensation related to options and RSUs granted to employees and non-employees | 11,380 | 15,122 | 14,164
Financial expenses (income), net | (218) | (892) | 54
Decrease in deferred tax assets, net | 1,437 | 1,780 | 3,406
Decrease (increase) in trade receivables, net | 1,600 | (20,567) | (14,438)
Decrease (increase) in other receivables and prepaid expenses | 625 | (1,621) | (1,221)
Decrease (increase) in inventories | (7,791) | (12,653) | 4,504
Decrease in operating lease right-of-use assets | 9,281 | 6,639 | 7,445
Decrease in operating lease liabilities | (6,914) | (9,509) | (7,556)
Decrease in royalty buyout liability | 0 | 0 | (11,684)
Increase (decrease) in trade payables | (3,782) | 3,475 | 879
Increase (decrease) in other payables and accrued expenses | (6,233) | (4,077) | 9,601
Increase (decrease) in deferred revenues | 3,144 | (2,030) | 5,480
Decrease in accrued severance pay, net | (362) | (349) | (1,062)
Net cash provided by operating activities | 14,891 | 8,281 | 47,344
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (5,965) | (1,487) | (1,174)
Purchase of marketable securities | 0 | 0 | (43,808)
Purchase of financial investments | (81) | (16,615) | 0
Proceeds from redemption of marketable securities | 3,084 | 1,123 | 3,240
Proceeds from redemption of financial investments | 14,094 | 1,052 | 0
Proceeds from sale of marketable securities | 3,846 | 2,250 | 2,571
Investment in short-term and restricted bank deposits | 0 | (5,000) | 0
Proceeds from short-term and restricted bank deposits | 4,998 | 10 | 84,597
Proceeds from long-term and restricted bank deposits | 0 | 94 | 0
Net cash paid for acquisition of subsidiary | 0 | (1,100) | (2,804)
Net cash provided by (used in) investing activities | 19,976 | (19,673) | 42,622
Cash flows from financing activities: |  |  |
Purchase of treasury stock | (18,259) | (38,099) | (41,852)
Repayment of long-term bank loans | 0 | 0 | (1,200)
Cash dividends paid | (11,399) | (11,552) | (10,865)
Proceeds from issuance of shares upon exercise of options | 802 | 1,055 | 2,440
Net cash used in financing activities | (28,856) | (48,596) | (51,477)
Increase (decrease) in cash, cash equivalents and restricted cash | 6,011 | (59,988) | 38,489
Cash, cash equivalents and restricted cash at the beginning of the year | 24,535 | 84,523 | 46,034
Cash, cash equivalents and restricted cash at the end of the year | 30,546 | 24,535 | 84,523
Supplemental disclosure of cash flow activities: |  |  |
Cash paid during the year for income taxes | 4,196 | 4,024 | 1,584
Cash paid during the year for interest | 0 | 0 | 455
Significant non-cash transactions: |  |  |
Inventory transferred to be used as property and equipment | 209 | 264 | 701
Non-cash purchase of property and equipment | 2,805 | 0 | 0
Operating lease right-of-use asset recognized with corresponding lease liability | $ 32,476 | $ 3,699 | $ (1,528)

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