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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Cash flows from operating activities: |  |  |
Net loss | $ (89,266) | $ (24,892) | $ (33,450)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |  |
Amortization of debt issuance costs | 0 | 0 | 541
Loan fees recognized on extinguishment of debt | 0 | 0 | 2,370
Depreciation and amortization | 12,337 | 17,868 | 11,711
Loss on goodwill and purchased intangible assets impairment | 49,521 | 3,277 | 0
Impairment loss on equipment and software license intangible assets | 100 | 203 | 167
Provision for bad debts | 439 | 40 | 141
Net impairment loss on marketable securities | 39 | 346 | 0
Inventory provision | 2,843 | 689 | 1,874
Share-based compensation expense | 7,500 | 5,983 | 6,471
Excess tax benefits from equity based compensation | 0 | 0 | (112)
Non-cash income tax expense (benefit) | 462 | (9,185) | 7,766
Changes in assets and liabilities: |  |  |
Accounts receivable | (6,242) | 26,437 | (19,963)
Inventories | 420 | 122 | (9,527)
Prepaid expenses and other assets | (1,237) | 3,661 | (2,461)
Accounts payable | (10,433) | (24,293) | 46,020
Accrued expenses, income taxes, and other | 3,638 | (1,787) | (5,337)
Net cash provided by (used in) operating activities | (29,879) | (1,531) | 6,211
Cash flows from investing activities: |  |  |
Purchases of property and equipment | (4,579) | (5,987) | (10,785)
Acquisition of business, net of cash acquired | 0 | 0 | (72,247)
Purchases of intangible assets | (104) | (284) | (110)
Purchases of marketable securities | (44,216) | (36,992) | (178,712)
Marketable securities maturities/sales | 46,696 | 74,922 | 174,286
Net cash provided by (used in) investing activities | (2,203) | 31,659 | (87,568)
Cash flows from financing activities: |  |  |
Proceeds from the issuance of short-term debt, net of issuance costs | 14,000 | 12,000 | 27,415
Principal repayments of short-term debt | (14,000) | (12,000) | (30,000)
Principal payments under capital lease obligations | (46) | (109) | (134)
Proceeds from stock option exercises and ESPP net of taxes paid on vested restricted stock units | 1,166 | (196) | 1,491
Excess tax benefits from stock options exercised | 0 | 0 | 112
Deposit of restricted funds | 0 | 0 | (188,890)
Remittance from restricted funds | 0 | 0 | 188,890
Net cash provided by (used in) financing activities | 1,120 | (305) | (1,116)
Effect of exchange rates on cash and cash equivalents | (63) | (129) | (177)
Net increase (decrease) in cash and cash equivalents | (31,025) | 29,694 | (82,650)
Cash and cash equivalents, beginning of period | 47,069 | 17,375 | 100,025
Cash and cash equivalents, end of period | 16,044 | 47,069 | 17,375
Cash paid during the year for: |  |  |
Interest | 17 | 8 | 181
Income taxes | 104 | 112 | 299
Supplemental disclosures of non-cash investing activities: |  |  |
Building rent incentives to fund leasehold improvements | 0 | 1,869 | 0
Supplemental disclosures of non-cash financing activities: |  |  |
Marketable equity securities received in settlement of note receivable | 0 | 386 | 0
Accrued debt issuance costs | $ 0 | $ 0 | $ 326

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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration