Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income (loss)	$ 7,190	$ (21,903)
Adjustments to reconcile net income (loss) to net cash used for operating activities:
Depreciation and amortization	6,180	5,367
Taxes	75
Stock-based compensation expense	3,644	2,953
Provision for excess inventory	661	1,734
Changes in operating assets & liabilities
Accounts receivable	17,994	(21,890)
Inventories	(13,384)	9,282
Prepaid expenses and other current assets	5,910	(2,747)
Accounts payable & other current liabilities	(15,237)	20,386
Deferred revenue	(4,339)	5,852
Income taxes	798	201
Other assets and liabilities	(8,640)	2,357
Net cash provided by operating activities	852	1,592
Cash flows from investing activities:
Expenditures for property, plant, and equipment	(1,950)	(761)
Decrease in restricted cash		3,421
Net cash provided by (used for) investing activities	(1,950)	2,660
Cash flows from financing activities:
Financing fees and other expenses	(199)	(523)
Proceeds from exercise of stock options	272	104
Proceeds from Employee Stock Purchase Plan	275	206
Net cash provided by (used for) financing activities	348	(213)
Effect of exchange rate changes on cash	(580)	57
Net increase (decrease) in cash and cash equivalents	(1,330)	4,096
Cash and cash equivalents at beginning of period	45,743	45,020
Cash and cash equivalents at end of period	$ 44,413	$ 49,116