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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
12 Months Ended
Jan. 03, 2020
Dec. 28, 2018
Dec. 29, 2017
Cash flows from operating activities:      
Net income (loss) $ 14,048,000 $ 4,968,000 $ (2,139,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation of property, plant, and equipment 3,665,000 2,430,000 3,133,000
Amortization of intangibles 34,000 34,000 221,000
Deferred income taxes (3,481,000) 441,000 (547,000)
Change in net pension liability 359,000 231,000 186,000
Loss on disposal of property and equipment 14,000 10,000 623,000
Stock-based compensation expense 10,547,000 6,762,000 3,161,000
Provision for sales returns and bad debts 275,000 905,000 463,000
Inventory provision 1,580,000 1,473,000 1,739,000
Changes in working capital:      
Accounts receivable (4,502,000) (6,040,000) (1,857,000)
Inventories (950,000) (4,194,000) 312,000
Prepayments, deposits, and other current assets (1,313,000) (598,000) (64,000)
Accounts payable 1,084,000 243,000 (2,501,000)
Other current liabilities 4,435,000 6,102,000 123,000
Net cash provided by operating activities 25,795,000 12,767,000 2,853,000
Cash flows from investing activities:      
Acquisition of property and equipment (10,095,000) (2,245,000) (1,046,000)
Acquisition of patents and licenses (83,000)    
Net cash used in investing activities (10,178,000) (2,245,000) (1,046,000)
Cash flows from financing activities:      
Proceeds from public offering of stock   72,150,000  
Repayment of finance lease obligations (1,294,000) (1,907,000) (1,300,000)
Repayment on line of credit (2,018,000) (747,000)  
Repurchase of employee common stock for taxes withheld   (54,000) (234,000)
Proceeds from the exercise of stock options 3,459,000 5,195,000 3,970,000
Proceeds from vested restricted stock 2,000 2,000 1,000
Net cash provided by financing activities 149,000 74,639,000 2,437,000
Effect of exchange rate changes on cash, cash equivalents and restricted cash 203,000 197,000 279,000
Increase in cash, cash equivalents and restricted cash 15,969,000 85,358,000 4,523,000
Cash, cash equivalents and restricted cash, at beginning of year 103,999,000 18,641,000 14,118,000
Cash, cash equivalents and restricted cash, at end of year $ 119,968,000 $ 103,999,000 $ 18,641,000