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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Cash flows from operating activities: |  |  |
Net income (loss) | $ (6,813) | $ 6,150 | $ 25,823
Adjustments to reconcile net income (loss) to net cash provided by operations: |  |  |
Depreciation and amortization | 5,470 | 3,927 | 3,410
Amortization of marketable securities premium | 518 | 323 | 368
Stock-based compensation | 1,277 | 1,215 | 896
Provision for doubtful accounts | 869 | 0 | 0
Realized loss (gain) on sale of investments | 0 | 0 | 8
Gain on sale of cost method investment | (811) | 0 | 0
Loss (gain) on disposal of property, plant and equipment | (9) | 195 | 6
Changes in assets and liabilities: |  |  |
Accounts receivable, net | 2,160 | 54 | 5,165
Inventories | 1,439 | 5,659 | (9,839)
Prepaid expenses and other current assets | (645) | 1,784 | (3,313)
Other assets | (1,859) | (174) | 426
Accounts payable | 2,185 | 2,608 | (3,840)
Accrued liabilities | (899) | 461 | (197)
Other long-term liabilities | (373) | (900) | (781)
Net cash provided by operating activities | 2,509 | 21,302 | 18,132
Cash flows from investing activities: |  |  |
Purchases of property, plant and equipment | (5,424) | (7,079) | (13,102)
Proceeds from disposal of property, plant and equipment | 0 | 2 | 33
Purchases of available for sale securities | (14,092) | (12,116) | (13,951)
Proceeds from sales and maturities of available for sale securities | 12,486 | 6,900 | 16,179
Investments in joint ventures | 0 | 0 | (3,024)
Repayment from (Loans to) related parties | 818 | (875) | (1,565)
Net cash used in investing activities | (6,212) | (13,168) | (15,430)
Cash flows from financing activities: |  |  |
Proceeds from common stock options exercised | 532 | 294 | 637
Repurchases of the Company's common stock, including commission | (716) | 0 | 0
Dividends paid by joint ventures | (2,329) | (4,086) | (1,636)
Net cash provided by (used in) financing activities | (2,513) | (3,792) | (999)
Effect of exchange rate changes on cash and cash equivalents | 543 | 136 | 729
Net increase (decrease) in cash and cash equivalents | (5,673) | 4,478 | 2,432
Cash and cash equivalents at the beginning of the year | 30,634 | 26,156 | 23,724
Cash and cash equivalents at the end of the year | 24,961 | 30,634 | 26,156
Supplemental disclosures: |  |  |
Income taxes paid | $ 782 | $ 1,729 | $ 3,234

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- Definition This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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