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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Cash flows from operating activities: |  |  |
Net income | $ 22,962,000 | $ 23,050,000 | $ 21,504,000
Adjustments to reconcile net income to cash provided by operating activities |  |  |
Stock-based compensation | 7,719,000 | 10,322,000 | 8,038,000
Depreciation and amortization | 3,760,000 | 4,046,000 | 4,102,000
Accretion (amortization) of discounts (premiums) on investments | (326,000) | (1,331,000) | (862,000)
Deferred income taxes | 737,000 | 1,320,000 | (61,000)
Impairment of long-lived assets | 353,000 | 0 | 0
Reversal of accruals related to expired warranties | (1,095,000) | (206,000) | (334,000)
Inventory reserve adjustment | 479,000 | (210,000) | 771,000
Other non-cash adjustments | 318,000 | 499,000 | 589,000
Changes in operating assets and liabilities: |  |  |
Accounts receivable, net | (12,687,000) | (17,212,000) | (12,873,000)
Contract assets | 1,129,000 | (2,184,000) | 1,128,000
Inventories, net | 7,000 | 1,202,000 | 1,354,000
Prepaid and other assets | 236,000 | (756,000) | (96,000)
Accounts payable | (1,462,000) | 787,000 | 2,629,000
Accrued expenses and other liabilities | (3,828,000) | 1,811,000 | 294,000
Contract liabilities | 468,000 | (616,000) | (129,000)
Net cash provided by operating activities | 18,770,000 | 20,522,000 | 26,054,000
Cash flows from investing activities: |  |  |
Sales of marketable securities | 0 | 0 | 2,966,000
Maturities of marketable securities | 66,675,000 | 76,508,000 | 64,955,000
Purchases of marketable securities | (31,370,000) | (90,997,000) | (84,555,000)
Capital expenditures | (1,330,000) | (1,298,000) | (2,567,000)
Proceeds from sales of fixed assets | 10,000 | 133,000 | 87,000
Net cash provided by (used in) investing activities | 33,985,000 | (15,654,000) | (19,114,000)
Cash flows from financing activities: |  |  |
Net proceeds from issuance of common stock | 1,796,000 | 7,100,000 | 4,794,000
Repurchase of common stock | (35,623,000) | (50,384,000) | 0
Payment of excise tax associated with repurchase of common stock | (707,000) | 0 | 0
Net cash (used in) provided by financing activities | (34,534,000) | (43,284,000) | 4,794,000
Effect of exchange rate differences on cash and cash equivalents | 98,000 | (52,000) | 33,000
Net change in cash, cash equivalents and restricted cash | 18,319,000 | (38,468,000) | 11,767,000
Cash, cash equivalents and restricted cash, beginning of year | 29,757,000 | 68,225,000 | 56,458,000
Cash, cash equivalents and restricted cash, end of year | 48,076,000 | 29,757,000 | 68,225,000
Cash paid for income taxes | 1,398,000 | 1,553,000 | 505,000
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] |  |  |
Purchases of property and equipment in trade accounts payable, and accrued expenses and other liabilities | 463,000 | 70,000 | 647,000
Excise tax on share repurchases, accrued but not paid | $ 34,000 | $ 387,000 | $ 0

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