Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011
Cash flows from operating activities:
Net income (loss)	$ (12,314)	$ (7,594)	$ 123
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Depreciation and amortization	1,223	1,220	1,236
Stock-based compensation	2,003	1,676	2,418
Utilization of wafer credits from TowerJazz Semiconductor Ltd.	0	0	(27)
Write-down of inventories	447	710	112
Gain on TowerJazz Semiconductor Ltd. Shares	0	0	(993)
Tax effect on other comprehensive income	(63)	0	(209)
Gain/loss on disposal of equipment	0	8	(18)
Gain/loss on disposal of equipment	25	102	8
Bad debt expense	10	0	7
Changes in operating assets and liabilities:
Accounts receivable	333	2,558	(1,693)
Inventories	289	(1,130)	(1,337)
Other assets	(87)	140	(105)
Trade payables	(654)	312	(352)
Accrued liabilities	140	(185)	507
Deferred income	(8)	(320)	16
Other long-term liabilities	(7)	24	124
Net cash provided by (used for) operating activities	(8,663)	(2,495)	(147)
Cash flows from investing activities:
Capital expenditures for property and equipment	(1,241)	(896)	(829)
Proceeds from sale of equipment	0	0	15
Proceeds from sale provided by TowerJazz Semiconductor Ltd. shares	0	0	1,084
Net cash provided by (used in) investing activities	(1,241)	(896)	270
Cash flows from financing activities:
Payment of debt and capital lease obligations	(452)	(408)	(8,389)
Proceeds from debt obligations	0	0	6,000
Proceeds from issuance of common stock and warrants, net of issuance cost	12,731	2,046	6,027
Net cash provided by (used in) financing activities	12,279	1,638	3,638
Net increase/(decrease) in cash and cash equivalents	2,375	(1,753)	3,761
Cash and cash equivalents at beginning of period	20,203	21,956	18,195
Cash and cash equivalents at end of period	22,578	20,203	21,956
Supplemental disclosures of cash flow information:
Interest paid	50	43	71
Income taxes paid	12	21	0
Supplemental schedule of non-cash investing and financing activities :
Capital lease obligation to finance capital expenditures	426	287	408
Purchase of equipment included in accounts payable	$ 11	$ 371	$ 97