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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Cash flows from operating activities: |  |  |  |
Net income (loss) | $ (1,959) |  | $ 2,952 |
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |  |
Depreciation and amortization | 1,291 |  | 907 |
Amortization of marketable securities premium | 146 |  | 71 |
Stock-based compensation | 332 |  | 281 |
Loss on disposal of property, plant and equipment | 0 |  | 29 |
Changes in assets and liabilities: |  |  |  |
Accounts receivable, net | 922 |  | 1,350 |
Inventories | 1,649 |  | 4,030 |
Prepaid expenses and other current assets | (1,740) |  | 491 |
Other assets | 105 |  | 124 |
Accounts payable | 664 |  | 883 |
Accrued liabilities | (164) | [1] | (1,108) | [1]
Other long-term liabilities | (270) |  | (459) |
Net cash provided by operating activities | 976 |  | 9,551 |
Cash flows from investing activities: |  |  |  |
Purchases of property, plant and equipment | (1,349) |  | (1,124) |
Purchases of available-for-sale securities | (12,410) |  | (3,079) |
Proceeds from maturities of available-for-sale securities | 8,130 |  | 2,700 |
Net cash used in investing activities | (5,629) |  | (1,503) |
Cash flows from financing activities: |  |  |  |
Proceeds from common stock options exercised | 256 |  | 219 |
Dividends paid by joint ventures | (532) |  | (3,384) |
Net cash used in financing activities | (276) |  | (3,165) |
Effect of exchange rate changes on cash and cash equivalents | 87 |  | 117 |
Net increase (decrease) in cash and cash equivalents | (4,842) |  | 5,000 |
Cash and cash equivalents at the beginning of the period | 30,634 | [2] | 26,156 |
Cash and cash equivalents at the end of the period | $ 25,792 |  | $ 31,156 |
[1] | Dividends accrued but not paid by joint ventures of $2,365 and $655 was included in accrued liabilities as of March 31, 2013 and March 31, 2012, respectively.
[2] | The condensed consolidated balance sheet at December 31, 2012 has been derived from the audited consolidated financial statements at that date.

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- Definition The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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