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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
3 Months Ended
Mar. 29, 2019
Mar. 30, 2018
Cash flows from operating activities:    
Net income $ 1,367 $ 583
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation of property, plant, and equipment 1,222 549
Amortization of intangibles 8 9
Deferred income taxes 79 92
Change in net pension liability 119 87
Loss on disposal of property and equipment   6
Stock-based compensation expense 2,641 1,301
Provision for sales returns and bad debts (34) 514
Inventory provision 455 506
Changes in working capital:    
Accounts receivable (554) (2,755)
Inventories (7) (396)
Prepayments, deposits, and other current assets (2,317) (730)
Accounts payable (185) 2,038
Other current liabilities (2,063) 726
Net cash provided by operating activities 731 2,530
Cash flows from investing activities:    
Acquisition of property and equipment (2,203) (965)
Acquisition of patents and licenses (30)  
Net cash used in investing activities (2,233) (965)
Cash flows from financing activities:    
Repayment of finance lease obligations (365) (380)
Repayment on line of credit (499)  
Proceeds from the exercise of stock options 622 453
Proceeds from vested restricted stock 2 1
Net cash provided by (used in) financing activities (240) 74
Effect of exchange rate changes on cash, cash equivalents and restricted cash (24) 612
Increase (decrease) in cash, cash equivalents and restricted cash (1,766) 2,251
Cash, cash equivalents and restricted cash, at beginning of year 103,999 18,641
Cash, cash equivalents and restricted cash, at end of year $ 102,233 $ 20,892