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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 29, 2012
Jul. 01, 2011
Cash flows from operating activities:    
Net (loss) income $ (259) $ 1,161
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation of property and equipment 627 598
Amortization of intangibles 350 394
Deferred income taxes 82 118
Fair value adjustment of warrant (207) (182)
Loss (gain) on disposal of property and equipment 31 (14)
Change in net pension liability 136 62
Stock-based compensation expense 1,481 807
Other 71 (32)
Changes in working capital:    
Accounts receivable 334 263
Inventories (344) 779
Prepaids, deposits and other current assets (138) 23
Accounts payable (1,089) (273)
Other current liabilities 153 (793)
Net cash provided by operating activities 1,228 2,911
Cash flows from investing activities:    
Release of restricted cash 129 0
Acquisition of property and equipment (833) (207)
Proceeds from sale of property and equipment 0 26
Net change in other assets 0 47
Net cash used in investing activities (704) (134)
Cash flows from financing activities:    
Repayment of capital lease obligations (438) (228)
Proceeds from exercise of stock options 950 1,216
Net cash provided by financing activities 512 988
Effect of exchange rate changes on cash and cash equivalents (74) (141)
Increase in cash and cash equivalents 962 3,624
Cash and cash equivalents, at beginning of the period 16,582 9,376
Cash and cash equivalents, at end of the period $ 17,544 $ 13,000