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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income $ 2,396 $ 62 $ 5,849
Adjustments to reconcile net income to net cash provided by (used in) operating activities:      
Depreciation and amortization 3,941 3,636 2,781
Loss on sale of property, plant and equipment 54 12
Loss (gain) from change in fair value of derivatives (490) (152) 10
Interest from short-term bank deposits and restricted deposits (6) (24) (33)
Change in provision for doubtful accounts 321 (29) 206
Share in results and sale of equity investment of affiliated companies 210 55 (1,237)
Share based compensation 174 105 38
Gain on bargain purchase   (4,833)
Liability in respect of employee rights upon retirement 241 123 28
Deferred income taxes, net 382 1,670 (21)
Changes in operating assets and liabilities:      
Decrease (increase) in trade accounts receivable (4,493) (2,392) (2,375)
Decrease (increase) in other current assets and prepaid expenses 488 1,487 (85)
Decrease (increase) in inventory 210 (2,707) (571)
Increase in trade accounts payable 578 1,192 436
Increase (decrease) in accrued expenses (1,505) 2,521 525
Increase (decrease) in other long-term liabilities (5) (38) 15
Net cash provided by operating activities 2,496 5,521 733
CASH FLOWS FROM INVESTING ACTIVITIES:      
Acquisitions of subsidiary, net of cash acquired in the amount of $1,164 (see note 3a)   (1,796)
Proceeds from sale of equity investment of affiliated company     3,624
Investment in affiliated company (383) (905)
Funds in respect of employee rights upon retirement (156) 2 8
Proceeds from sale of property and equipment 17 9
Purchase of property and equipment (3,520) (5,702) (3,315)
Investment in short-term deposit   (8,109)
Maturities of short-term deposits 500 7,182 5,109
Net cash provided by (used in) investing activities (3,559) 594 (4,470)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Dividend paid (3,000) (3,000)
Repayments of short-term loans   (469)
Payment of contingent consideration   (500)
Exercise of options 144 130
Net cash used in financing activities (2,856) (3,370) (469)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS (3,919) 2,745 (4,206)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR 21,433 18,688 22,894
CASH AND CASH EQUIVALENTS AT END OF YEAR 17,514 21,433 18,688
SUPPLEMENTARY INFORMATION ON INVESTING ACTIVITIES NOT INVOLVING CASH FLOW:      
Purchase of property, plant and equipment on credit 632 268 76
Supplemental disclosure of cash flow information:      
Interest paid (35) (2) (4)
Income taxes paid $ (2,397) $ (1,473) $ (1,321)