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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 03, 2014
Dec. 28, 2012
Dec. 30, 2011
Cash flows from operating activities:      
Net income (loss) $ 398 $ (1,763) $ 1,348
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation of property and equipment 1,711 1,309 1,469
Amortization of intangibles 440 652 797
Deferred income taxes 104 143 367
Fair value adjustment of warrant (27) (335) 117
Change in net pension liability 162 205 257
Loss on disposal of property and equipment 200 131 13
Stock-based compensation expense 4,489 3,208 1,914
Accretion of asset retirement obligation 10 16 0
Provision for sales return and bad debt 263 77 (320)
Changes in working capital:      
Accounts receivable trade, net (2,938) 224 (435)
Inventories (1,603) (1,020) (85)
Prepaids, deposits and other current assets (1,063) (298) (145)
Accounts payable 367 1,014 480
Other current liabilities 842 (346) (431)
Net cash provided by operating activities 3,355 3,217 5,346
Cash flows from investing activities:      
Acquisition of property and equipment (3,448) (2,271) (962)
Proceeds from the sale of property and equipment 0 0 26
Net change in other noncurrent assets 0 (4) 47
Decrease in restricted cash, including reinvested interest 0 129 0
Net cash used in investing activities (3,448) (2,146) (889)
Cash flows from financing activities:      
Borrowings under lines of credit 0 3,510 0
Repayment of capital lease lines of credit (841) (741) (575)
Proceeds from the exercise of stock options 3,286 1,514 3,343
Net cash provided by financing activities 2,445 4,283 2,768
Effect of exchange rate changes on cash and cash equivalents (1,073) (261) (19)
Increase in cash and cash equivalents 1,279 5,093 7,206
Cash and cash equivalents, at beginning of year 21,675 16,582 9,376
Cash and cash equivalents, at end of year $ 22,954 $ 21,675 $ 16,582