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Consolidated Statements of Cash Flow (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Cash flows from operating activities |  |  |
Net income (loss) | $ (34,034) | $ 5,077 | $ (17,573)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities: |  |  |
Depreciation and amortization | 6,877 | 8,497 | 7,045
Gain on sale of dry strip assets and intellectual property | (7,904) |  |
Deferred taxes | 826 | 585 | (1,525)
Other | 186 | 28 |
Stock-based compensation expense | 3,976 | 4,687 | 4,088
Provision for excess inventory | 14,492 | 1,015 | 2,015
Changes in operating assets & liabilities |  |  |
Accounts receivable | 10,478 | 22,692 | (38,652)
Inventories | 5,903 | (11,870) | 3,549
Prepaid expenses and other current assets | 4,386 | 3,049 | (3,469)
Accounts payable and other current liabilities | (13,490) | (17,940) | 32,276
Deferred revenue | (5,396) | (4,006) | 10,601
Income taxes | (225) | 507 | (1,406)
Other assets and liabilities | 3,328 | (8,788) | (2,841)
Net cash (used for) provided by operating activities | (10,597) | 3,533 | (5,892)
Cash flows from investing activities |  |  |
Proceeds from sale of dry strip assets and intellectual property | 8,716 |  |
Expenditures for property, plant, and equipment | (591) | (2,124) | (1,403)
(Increase) decrease in restricted cash | (2) | 3 | 7,056
Net cash provided by (used for) investing activities | 8,123 | (2,121) | 5,653
Cash flows from financing activities |  |  |
Financing fees and other expenses |  | (200) | (523)
Proceeds from exercise of stock options | 968 | 288 | 553
Proceeds from Employee Stock Purchase Plan | 331 | 503 | 569
Net cash provided by financing activities | 1,299 | 591 | 599
Effect of exchange rate changes on cash | (716) | (869) | 363
Net (decrease) increase in cash and cash equivalents | (1,891) | 1,134 | 723
Cash and cash equivalents at beginning of period | 46,877 | 45,743 | 45,020
Cash and cash equivalents at end of period | 44,986 | 46,877 | 45,743
Cash paid for: |  |  |
Income taxes | 848 | 515 | 2,286
Issuance of restricted common stock in satisfaction of accrued compensation |  |  | $ 570

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph i -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph a -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. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -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. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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