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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 income | $ 7,519 | $ 27,404 | $ 18,587
Adjustments to reconcile net income to net cash (used in) provided by operating activities: |  |  |
Depreciation and amortization of property, plant and equipment and intangible assets | 21,780 | 22,138 | 22,229
Amortization of other long-term assets | 1,754 | 3,573 | 3,943
Amortization and accretion of deferred loan fees and discounted liabilities | 254 | 289 | 359
Loss on disposal of property, plant and equipment | 0 | 268 | 194
Provision for bad debts | 1,935 | 1,171 | 649
Loan principal and interest forgiveness | 0 | 0 | (672)
Fair value adjustment of contingent consideration | 0 | 610 | 758
Decrease in environmental liability | 0 | 0 | (167)
Stock-based compensation | 6,138 | 5,684 | 6,880
Deferred income taxes | (9,710) | (5,278) | (2,090)
Changes in liabilities for uncertain tax positions or unrecognized tax benefits | (508) | (1,441) | (1,783)
Change in equity investment fair value | 359 | 732 | 790
Loss from equity method investment | 0 | 0 | 388
Bargain purchase gain | 0 | 0 | (171)
Non-cash lease expense | 256 | 68 | 286
Foreign currency transaction gains | (581) | (29) | (225)
Changes in assets and liabilities associated with operations, net of business combinations: |  |  |
Increase in receivables | (20,278) | (6,447) | (24,347)
(Increase) decrease in inventories | (27,315) | (29,220) | 9,357
(Increase) decrease in income tax receivable | 3,568 | (4,910) | 6,051
(Increase) decrease in prepaid expenses and other assets | 1,269 | (3,082) | (4,581)
Increase (decrease) in accounts payable | (2,287) | 1,704 | 8,783
(Decrease) Increase in customer prepayments | (45,079) | 47,551 | 19,280
Increase (decrease) in accrued program costs | 7,244 | (2,449) | 17,877
Increase (decrease) in accrued expenses and other payables | (5,066) | 90 | 3,986
Decrease in contingent consideration | 0 | (1,321) | 0
Net cash (used in) provided by operating activities | (58,748) | 57,105 | 86,361
Cash flows from investing activities: |  |  |
Capital expenditures | (11,878) | (13,261) | (9,518)
Proceeds from disposal of property, plant and equipment | 242 | 84 | 0
Acquisitions of business and product line, net of cash acquired | (5,195) | 0 | (10,000)
Intangible assets | (186) | (1,293) | (524)
Net cash used in investing activities | (17,017) | (14,470) | (20,042)
Cash flows from financing activities: |  |  |
Payments under line of credit agreement | (172,500) | (254,000) | (186,569)
Borrowings under line of credit agreement | 259,100 | 253,000 | 131,000
Payment of contingent consideration | 0 | (68) | (1,301)
Net receipt from the issuance of common stock under ESPP | 981 | 837 | 743
Net receipt from the exercise of stock options | 46 | 827 | 172
Net payment from common stock purchased for tax withholding | (1,967) | (2,067) | (2,955)
Repurchase of common stock | (15,539) | (34,002) | (4,579)
Payment of cash dividends | (3,384) | (2,787) | (2,382)
Net cash provided by (used in) financing activities | 66,737 | (38,260) | (65,871)
Net (decrease) increase in cash | (9,028) | 4,375 | 448
Effect of exchange rate changes on cash | 116 | (332) | (86)
Cash at beginning of year | 20,328 | 16,285 | 15,923
Cash at end of year | $ 11,416 | $ 20,328 | $ 16,285

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