Consolidated Statements of Cash Flow (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities
Net income (loss)	$ (34,034)	$ 5,077	$ (17,573)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Depreciation and amortization	6,877	8,497	7,045
Gain on sale of dry strip assets and intellectual property	(7,904)
Deferred taxes	826	585	(1,525)
Other	186	28
Stock-based compensation expense	3,976	4,687	4,088
Provision for excess inventory	14,492	1,015	2,015
Changes in operating assets & liabilities
Accounts receivable	10,478	22,692	(38,652)
Inventories	5,903	(11,870)	3,549
Prepaid expenses and other current assets	4,386	3,049	(3,469)
Accounts payable and other current liabilities	(13,490)	(17,940)	32,276
Deferred revenue	(5,396)	(4,006)	10,601
Income taxes	(225)	507	(1,406)
Other assets and liabilities	3,328	(8,788)	(2,841)
Net cash (used for) provided by operating activities	(10,597)	3,533	(5,892)
Cash flows from investing activities
Proceeds from sale of dry strip assets and intellectual property	8,716
Expenditures for property, plant, and equipment	(591)	(2,124)	(1,403)
(Increase) decrease in restricted cash	(2)	3	7,056
Net cash provided by (used for) investing activities	8,123	(2,121)	5,653
Cash flows from financing activities
Financing fees and other expenses		(200)	(523)
Proceeds from exercise of stock options	968	288	553
Proceeds from Employee Stock Purchase Plan	331	503	569
Net cash provided by financing activities	1,299	591	599
Effect of exchange rate changes on cash	(716)	(869)	363
Net (decrease) increase in cash and cash equivalents	(1,891)	1,134	723
Cash and cash equivalents at beginning of period	46,877	45,743	45,020
Cash and cash equivalents at end of period	44,986	46,877	45,743
Cash paid for:
Income taxes	848	515	2,286
Issuance of restricted common stock in satisfaction of accrued compensation			$ 570