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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Cash flows from operating activities:    
Net loss $ (74,354) $ (21,488)
Adjustments to reconcile net loss to net cash used in operating activities:    
Loss on sale/disposal of fixed asset 90  
Depreciation and amortization 9,747 13,782
Loss on goodwill and purchased intangible assets impairment 49,821 3,514
Impairment loss on software license intangible assets (7,259) 133
Provision for bad debts 39 59
Net impairment loss on marketable securities 39 346
Inventory provision 1,663 576
Share-based compensation expense 5,409 4,057
Non-cash income tax expense (benefit) 194 (11,287)
Changes in assets and liabilities:    
Accounts receivable (3,460) 9,046
Inventories 4,089 (6,634)
Prepaid expenses and other assets (1,238) 3,484
Accounts payable (15,108) (23,941)
Accrued expenses, income taxes, and other 233 1,651
Net cash used in operating activities (22,836) (26,702)
Cash flows from investing activities:    
Purchases of property and equipment (4,021) (4,928)
Purchases of intangible assets   (219)
Purchases of marketable securities (31,871) (21,366)
Marketable securities maturities/sales 27,506 58,539
Net cash provided by (used in) investing activities (8,386) 32,026
Cash flows from financing activities:    
Proceeds from the issuance of short-term debt 5,000 12,000
Principal repayments of short-term debt (5,000) (12,000)
Principal payments under capital lease obligations (46) (81)
Proceeds from stock option exercises and ESPP net of taxes paid on vested restricted stock units 583 (617)
Net cash provided by (used in) financing activities 537 (698)
Effect of exchange rates on cash and cash equivalents (43) (74)
Net increase (decrease) in cash and cash equivalents (30,728) 4,552
Cash and cash equivalents, beginning of period 47,069 17,375
Cash and cash equivalents, end of period 16,341 21,927
Cash paid during the year for:    
Interest 1 7
Income taxes 100 194
Supplemental disclosures of non-cash investing activities:    
Building rent incentives to fund leasehold improvements   1,869
Supplemental disclosures of non-cash financing activities:    
Marketable equity securities received in settlement of note receivable   $ 384