CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012
Cash flows from operating activities:
Net income (loss)	$ 749	$ (259)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of property and equipment	840	627
Amortization of intangibles	225	350
Deferred income taxes	129	82
Fair value adjustment of warrant	(27)	(207)
Loss on disposal of property and equipment	59	31
Change in net pension liability	57	136
Stock-based compensation expense	2,019	1,481
Accretion of asset retirement obligation	7	0
Other	111	71
Changes in working capital:
Accounts receivable	(2,229)	334
Inventories	71	(344)
Prepaids, deposits and other current assets	(507)	(138)
Accounts payable	(1,123)	(1,089)
Other current liabilities	(25)	153
Net cash provided by operating activities	356	1,228
Cash flows from investing activities:
Release of restricted cash	0	129
Acquisition of property and equipment	(2,017)	(833)
Net cash used in investing activities	(2,017)	(704)
Cash flows from financing activities:
Repayment of capital lease obligations	(478)	(438)
Proceeds from exercise of stock options	952	950
Net cash provided by financing activities	474	512
Effect of exchange rate changes on cash and cash equivalents	(763)	(74)
Increase (decrease) in cash and cash equivalents	(1,950)	962
Cash and cash equivalents, at beginning of the period	21,675	16,582
Cash and cash equivalents, at end of the period	$ 19,725	$ 17,544