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Condensed Interim Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Cash flows from operating activities    
Net income $ 7,375 $ 6,392
Adjustments required to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 427 307
Write-down of obsolete inventory 231 944
Liability for employees' severance benefits, net 35 141
Discount of marketable securities 422 331
Share-based compensation expense 467 333
Deferred taxes (225) (186)
Capital (gain) loss    1
Changes in assets and liabilities:    
Accounts receivable - trade 310 3,066
Accounts receivable - other 731 (293)
Inventories 308 (12,901)
Trade accounts payable (3,408) 665
Other accounts payable and accrued expenses 212 231
Net cash provided by (used in) operating activities 6,885 (969)
Cash flows from investing activities    
Proceeds from (investments in) short term bank deposits, net 3,000 1,027
Purchases of property, plant and equipment (1,027) (388)
Proceeds from maturity of marketable securities 10,000 2,418
Purchases of marketable securities (9,990) (5,703)
Net cash provided by (used in) investing activities 1,983 (2,646)
Cash flows from financing activities    
Exercise of options 800 1,423
Dividend (7,183) (3,913)
Net cash used in financing activities (6,383) (2,490)
Effect of exchange rate changes on cash balances held 43 50
Increase (decrease) in cash and cash equivalents 2,528 (6,055)
Cash and cash equivalents at beginning of period 12,997 13,306
Cash and cash equivalents at end of period 15,525 7,251
Supplementary cash flow information    
Non-cash transactions - Investments in PP&E 146 44
Cash paid during the period for Taxes $ 845 $ 1,113