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Consolidated Statements Of Cash Flows (USD $)
In Thousands
 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Cash flows from operating activities:    
Net loss $ (25,986) $ (25,428)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Accrued interest expense 0 147
Amortization of debt issuance costs 0 541
Depreciation and amortization 9,686 5,409
Impairment loss on intangible assets and equipment 75 146
Provision for bad debts 123 28
Net impairment loss on marketable securities 154 0
Inventory provision 320 430
Share-based compensation expense 2,486 3,143
Excess tax benefits from equity based compensation 0 (89)
Non-cash income tax expense (benefit) (401) 13,569
Changes in assets and liabilities:    
Accounts receivable 21,925 (9,108)
Inventories (7,371) 7,714
Prepaid expenses and other assets 3,010 483
Accounts payable (20,965) 10,864
Accrued expenses, income taxes, and other (575) (3,888)
Net cash provided by (used in) operating activities (17,519) 3,961
Cash flows from investing activities:    
Purchases of property and equipment (3,835) (3,609)
Purchases of intangible assets (100) (185)
Purchases of securities (10,959) (77,367)
Securities maturities/sales 47,674 153,371
Net cash provided by investing activities 32,780 72,210
Cash flows from financing activities:    
Proceeds from the issuance of short-term debt, net of issuance costs 0 27,415
Principal payments under capital lease obligations (55) (76)
Proceeds from stock option exercises net of taxes paid on vested restricted stock units (622) 570
Excess tax benefits from equity based compensation 0 89
Deposit of restricted funds 0 (188,890)
Net cash used in financing activities (677) (160,892)
Effect of exchange rates on cash and cash equivalents 54 (83)
Net increase (decrease) in cash and cash equivalents 14,638 (84,804)
Cash and cash equivalents, beginning of period 17,375 100,025
Cash and cash equivalents, end of period 32,013 15,221
Supplemental disclosures of cash flow information:    
Interest 3 66
Income taxes 152 229
Supplemental disclosures of non-cash financing activities:    
Marketable equity securities received in settlement of note receivable 384 0
Accrued debt issuance costs $ 0 $ 325