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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Cash flows from operating activities:    
Net income $ 477 $ 913
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:    
Depreciation and amortization 85 86
Stock based compensation 39 50
Changes in operating assets and liabilities:    
Accounts receivable 160 (232)
Inventories 398 (93)
Prepaid expenses and other current assets 106 163
Other assets   (1)
Accounts payable (66) 11
Accrued liabilities (22) (31)
Accrued income taxes (71) 97
Deferred income taxes 84 53
Deferred revenue   (67)
Net cash provided by operating activities 1,190 949
Cash flows from investing activities:    
Property, plant and equipment (202) (41)
Share repurchase (2,764)  
Intangibles (31) (19)
Net cash used in investing activities (2,997) (60)
Cash flows from financing activities:    
Proceeds from exercise of stock options 6 34
Net cash provided by financing activities 6 34
Effect of exchange rate changes on cash and cash equivalents (27) 36
Net increase (decrease) in cash and cash equivalents (1,828) 959
Cash, cash equivalents and restricted cash, beginning of period 7,777 6,014
Cash, cash equivalents and restricted cash, end of period 5,949 6,973
Supplemental disclosure of cash flow information:    
Income taxes paid $ 210 $ 293