Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (10,251,000)	$ (8,983,000)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation and amortization	634,000	766,000
Stock-based compensation expense	1,229,000	822,000
Write-off of intangibles	844,000
Provision for excess and obsolete inventories	63,000	270,000
Fair value of derivatives		(171,000)
Changes in assets and liabilities:
Accounts receivable	22,000	212,000
Inventories	(170,000)	(22,000)
Prepaid expenses and other current assets	17,000	(48,000)
Patents and licenses	(34,000)	(154,000)
Other assets	26,000	8,000
Accounts payable, accrued expenses and other current liabilities	1,148,000	873,000
Net cash used in operating activities	(6,472,000)	(6,427,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(2,040,000)	(309,000)
Net cash used in investing activities	(2,040,000)	(309,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of common shares for withholding obligations	(303,000)	(573,000)
Net proceeds from the sale of common stock	12,402,000	5,219,000
Net cash provided by financing activities	12,099,000	4,646,000
Net increase (decrease) in cash and cash equivalents	3,587,000	(2,090,000)
Cash and cash equivalents at beginning of period	6,069,000	10,365,000
Cash and cash equivalents at end of period	$ 9,656,000	$ 8,275,000