Consolidated Statements of Cash Flow (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income (loss)	$ 6,039	$ (15,630)
Adjustments to reconcile net income (loss) to net cash used for operating activities:
Depreciation and amortization	4,009	3,711
Taxes	16
Stock-based compensation expense	2,124	1,568
Provision for excess inventory	536	1,331
Changes in operating assets & liabilities:
Accounts receivable	571	(16,011)
Inventories	(13,894)	13,844
Prepaid expenses and other current assets	4,442	(5,051)
Accounts payable & other current liabilities	(3,618)	11,502
Deferred revenue	(2,989)	5,366
Income taxes	629	(110)
Other assets and liabilities	(5,920)	1,673
Net cash provided by (used for) operating activities	(8,055)	2,193
Cash flows from investing activities:
Expenditures for property, plant, and equipment	(1,231)	(480)
(Increase) decrease in restricted cash	(9)	3,116
Net cash provided by (used for) investing activities	(1,240)	2,636
Cash flows from financing activities:
Financing fees and other expenses	(194)	(514)
Proceeds from exercise of stock options	239	55
Proceeds from Employee Stock Purchase Plan	275	206
Net cash provided by (used for) financing activities	320	(253)
Effect of exchange rate changes on cash	1,089	(1,710)
Net increase (decrease) in cash and cash equivalents	(7,886)	2,866
Cash and cash equivalents at beginning of period	45,743	45,020
Cash and cash equivalents at end of period	$ 37,857	$ 47,886