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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2016
Jan. 01, 2016
Jan. 02, 2015
Cash flows from operating activities:      
Net loss $ (12,129) $ (6,533) $ (8,392)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:      
Depreciation of property, plant, and equipment 2,664 2,196 2,078
Amortization of intangibles 228 205 382
Deferred income taxes (1,364) 473 (841)
Change in net pension liability 491 190 194
Loss on disposal of property and equipment 222 0 0
Stock-based compensation expense 8,558 3,304 4,663
Accretion of asset retirement obligation 0 0 3
Provision for sales returns and bad debts 205 345 182
Changes in working capital:      
Accounts receivable (771) (4,952) (934)
Inventories, net 1,823 327 (3,943)
Prepayments, deposits, and other current assets (851) 856 (1,062)
Accounts payable 1,007 14 972
Other current liabilities 966 1,413 (1,253)
Net cash provided by (used in) operating activities 1,049 (2,162) (7,951)
Cash flows from investing activities:      
Acquisition of property and equipment (3,205) (2,045) (4,054)
Sale of property and equipment 0 2 0
Net cash used in investing activities (3,205) (2,043) (4,054)
Cash flows from financing activities:      
Repayment of capital lease obligations (424) (391) (490)
Proceeds from sale-leaseback transactions 1,546 0 0
Repurchase of employee common stock for taxes withheld (611) 0 0
Proceeds from the exercise of stock options 2,438 2,168 3,022
Proceeds from vested restricted stock 4 2 0
Proceeds from the exercise of warrants 0 2,800 0
Net cash provided by financing activities 2,953 4,579 2,532
Effect of exchange rate changes on cash and cash equivalents (200) 15 (468)
Increase (decrease) in cash and cash equivalents 597 389 (9,941)
Cash and cash equivalents, at beginning of year 13,402 13,013 22,954
Cash and cash equivalents, at end of year $ 13,999 $ 13,402 $ 13,013