Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Cash flows from operating activities:
Net income (loss)	$ (6,825)	$ (6,957)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Depreciation and amortization	632	587
Stock-based compensation	737	818
Write-down of inventories	249	428
Gain on sale of TowerJazz Semiconductor Ltd. Shares	(181)	0
Tax effect on other comprehensive income	273	(63)
Bad Debt	11	10
Changes in operating assets and liabilities:
Accounts receivable	(862)	(86)
Inventories	(824)	609
Other assets	69	9
Trade payables	579	(852)
Accrued liabilities	841	454
Other long-term liabilities	26	(9)
Net cash provided by (used for) operating activities	(5,275)	(5,052)
Cash flows from investing activities:
Capital expenditures for property and equipment	(83)	(265)
Proceeds from sale of TowerJazz Semiconductor Ltd. Shares	265	0
Net cash provided by (used for) investing activities	182	(265)
Cash flows from financing activities:
Payment of debt and capital lease obligations	(72)	(151)
Net proceeds from issuance of common stock	348	12,132
Net increase (decrease) in cash and cash equivalents	276	11,981
Net increase (decrease) in cash and cash equivalents	(4,817)	6,664
Cash and cash equivalents at beginning of period	22,578	20,203
Cash and cash equivalents at end of period	17,761	26,867
Supplemental schedule of non-cash investing and financing activities :
Capital lease obligation to finance capital expenditures	305	756
Purchase of equipment included in accounts payable	$ 0	$ 52