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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Cash flows from operating activities: |  |
Net income (loss) | $ (15,434) | $ 17,247
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |
Depreciation and amortization | 6,424 | 6,050
Amortization of marketable securities premium | 18 | 50
Stock-based compensation | 2,718 | 3,261
(Gain) Loss on disposal of equipment | 18 | (136)
Return of equity method investments as dividends | 3,666 | 1,608
Equity in income of unconsolidated joint ventures | (2,344) | (5,308)
Deferred tax assets | 122 | 165
Changes in operating assets and liabilities: |  |
Accounts receivable | 9,594 | (5,406)
Inventories | (1,013) | (32,659)
Prepaid expenses and other current assets | 1,909 | 6,445
Other assets | 219 | (1,461)
Accounts payable | (3,375) | (1,635)
Accrued liabilities | (1,742) | (2,927)
Other long-term liabilities | 1,194 | 5,405
Net cash provided by (used in) operating activities | 1,974 | (9,301)
Cash flows from investing activities: |  |
Purchases of property, plant and equipment | (11,178) | (28,765)
Purchases of available-for-sale debt securities |  | (2,160)
Proceeds from sales and maturities of available-for-sale debt securities | 7,423 | 5,400
Proceeds from sales of equity securities - 15% of Jia Mei | 827 |
Investments in non-marketable equity investments | (1,918) |
Net cash used in investing activities | (4,846) | (25,525)
Cash flows from financing activities: |  |
Proceeds from common stock options exercised | 10 | 517
Proceeds from bank loans | 42,197 | 42,352
Payments on bank loans | (40,673) | (9,826)
Proceeds from capital increase in subsidiary shares from noncontrolling interests | 708 | 2,232
Net cash provided by financing activities | 2,242 | 35,275
Effect of exchange rate changes on cash and cash equivalents, and restricted cash | (1,418) | (394)
Net increase (decrease) in cash and cash equivalents, and restricted cash | (2,048) | 55
Cash and cash equivalents, and restricted cash at the beginning of the year | 41,348 | 36,763
Cash and cash equivalents, and restricted cash at the end of the period | 39,300 | 36,818
Supplemental disclosure of non-cash flow information: |  |
Conversion of related party borrowings to Additional Paid-in Capital |  | 1,887
Investment in subsidiary shares from noncontrolling interest | 308 | 937
Bank loan proceeds paid directly to a third-party vendor, included in accounts payable |  | 474
Sales of land and building to unconsolidated joint venture |  | 976
Consideration payable in connection with construction in progress, included in accrued liabilities | $ 3,315 | $ 3,378

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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-8 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-24 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-4 + Details
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