Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net loss	$ (8,460)	$ (6,554)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	1,307	1,255
Provision (recovery) for bad debts	(181)	339
Provision for inventory obsolescence	1,706	2,718
Gain on sale of property, plant and equipment	(51)
Stock-based compensation	477	698
Deferred taxes	825	(143)
Net change in operating assets and liabilities:
Accounts receivable	692	1,659
Inventories	(2,327)	651
Other current assets	1,409	(1,579)
Deferred revenue	(629)	743
Other assets	(154)
Other long-term liabilities	620
Accounts payable	1,142	3,212
Accrued expenses	486	(566)
Net cash provided by (used in) operating activities	(3,138)	2,433
Cash flows provided by (used in) investing activities:
Proceeds from sale of property, plant and equipment	57
Purchases of property, plant and equipment	(208)	(198)
Net cash used in investing activities	(151)	(198)
Cash flows from financing activities:
Principal payments under loan and capital lease agreements	(294)	(277)
Issuance of common stock	17	29
Proceeds from the exercise of stock options		9
Net cash used in financing activities	(277)	(239)
Effects of exchange rates on cash	20	85
Net increase (decrease) in cash and cash equivalents	(3,546)	2,081
Cash and cash equivalents, beginning of period	20,218	18,948
Cash and cash equivalents, end of period	16,672	21,029
Cash paid during the periods for:
Interest	293	299
Income taxes	$ 484	$ 230