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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 28, 2019
Jun. 29, 2018
Cash flows from operating activities:    
Net income $ 5,281 $ 2,413
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation of property, plant, and equipment 1,983 1,168
Amortization of intangibles 17 17
Deferred income taxes 393 358
Change in net pension liability 203 159
Loss on disposal of property and equipment   6
Stock-based compensation expense 5,220 2,899
Provision for sales returns and bad debts (32) 644
Inventory provision 787 753
Changes in working capital:    
Accounts receivable (6,533) (6,390)
Inventories 106 (1,536)
Prepayments, deposits, and other current assets (1,154) (889)
Accounts payable 563 956
Other current liabilities (2,626) 1,748
Net cash provided by operating activities 4,208 2,306
Cash flows from investing activities:    
Acquisition of property and equipment (4,601) (1,269)
Acquisition of patents and licenses (30)  
Net cash used in investing activities (4,631) (1,269)
Cash flows from financing activities:    
Repayment of finance lease obligations (681) (881)
Repayment on line of credit (999)  
Proceeds from the exercise of stock options 1,110 2,405
Proceeds from vested restricted stock 2 2
Net cash provided by (used in) financing activities (568) 1,526
Effect of exchange rate changes on cash, cash equivalents and restricted cash 243 163
Increase (decrease) in cash, cash equivalents and restricted cash (748) 2,726
Cash, cash equivalents and restricted cash, at beginning of year 103,999 18,641
Cash, cash equivalents and restricted cash, at end of year $ 103,251 $ 21,367