Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities
Net loss	$ (8,988)	$ (10,028)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation and amortization	1,394	1,896
Gain on sale of dry strip assets and intellectual property	(368)
Deferred taxes	56	378
Stock-based compensation expense	839	1,082
Provision for excess inventory	2,211	248
Changes in operating assets & liabilities
Accounts receivable	1,458	4,810
Inventories	(1,672)	(8,277)
Prepaid expenses and other current assets	(544)	(385)
Accounts payable and other current liabilities	5,043	(2,162)
Deferred revenue	(843)	(3,818)
Income taxes	84	76
Other assets and liabilities	(549)	6,483
Net cash used for operating activities	(1,879)	(9,697)
Cash flows from investing activities
Proceeds from sale of dry strip assets and intellectual property	400
Expenditures for property, plant, and equipment	(150)	(141)
(Increase) decrease in restricted cash	3	(3)
Net cash provided by (used for) investing activities	253	(144)
Cash flows from financing activities
Proceeds from exercise of stock options	49	802
Proceeds from Employee Stock Purchase Plan		175
Net cash provided by financing activities	49	977
Effect of exchange rate changes on cash	(968)	(795)
Net decrease in cash and cash equivalents	(2,545)	(9,659)
Cash and cash equivalents at beginning of period	44,986	46,877
Cash and cash equivalents at end of period	$ 42,441	$ 37,218