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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 30, 2012
Apr. 01, 2011
Cash flows from operating activities:    
Net income $ 232 $ 300
Adjustments to reconcile net income to net cash (used in) provided by operating activities:    
Depreciation of property and equipment 317 307
Amortization of intangibles 175 197
Deferred income taxes 57 44
Fair value adjustment of warrant 14 (103)
Gain on disposal of property and equipment   (14)
Change in net pension liability 72 60
Stock-based compensation expense 687 355
Other 40 (81)
Changes in working capital:    
Accounts receivable 556 666
Inventories (432) 548
Prepaids, deposits and other current assets (665) (473)
Accounts payable (1,100) (87)
Other current liabilities (390) (1,169)
Net cash (used in) provided by operating activities (437) 550
Cash flows from investing activities:    
Acquisition of property and equipment (287) (44)
Release of restricted cash 129  
Proceeds from sale of property and equipment   26
Net change in other assets   48
Net cash (used in) provided by investing activities (158) 30
Cash flows from financing activities:    
Repayment of capital lease obligations (195) (131)
Proceeds from exercise of stock options 837 606
Net cash provided by financing activities 642 475
Effect of exchange rate changes on cash and cash equivalents (184) (219)
(Decrease) increase in cash and cash equivalents (137) 836
Cash and cash equivalents, at beginning of the period 16,582 9,376
Cash and cash equivalents, at end of the period $ 16,445 $ 10,212