Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011
Cash flows from operating activities:
Net income (loss)	$ (9,755)	$ (4,484)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Depreciation and amortization	907	952
Stock-based compensation	1,419	1,291
Write-down of inventories	428	562
(Gains) losses on disposal of equipment	0	(12)
Write-off of equipment	25	102
Tax effect on other comprehensive income	(63)	0
Bad Debt	10	0
Changes in operating assets and liabilities:
Accounts receivable	240	2,165
Inventories	820	(1,080)
Other assets	(68)	101
Trade payables	(1,296)	(228)
Accrued liabilities	722	(262)
Deferred royalty revenue	(8)	(238)
Other long-term liabilities	(1)	3
Net cash provided by (used for) operating activities	(6,620)	(1,128)
Cash flows from investing activities:
Capital expenditures for property and equipment	(814)	(665)
Net cash provided by (used for) investing activities	(814)	(665)
Cash flows from financing activities:
Payment of debt and capital lease obligations	(311)	(371)
Net proceeds from issuance of common stock	12,490	1,779
Net cash provided by (used for) financing activities	12,179	1,408
Net increase (decrease) in cash and cash equivalents	4,745	(385)
Cash and cash equivalents at beginning of period	20,203	21,956
Cash and cash equivalents at end of period	24,948	21,571
Supplemental schedule of non-cash investing and financing activities :
Capital lease obligation to finance capital expenditures and related maintenance	721	37
Purchase of equipment included in accounts payable	$ 1	$ 115