Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (2,041)	$ (3,452)
Adjustments required to reconcile net income to net cash provided by operating activities:
Depreciation	869	909
Equity-based compensation expenses related to employees’ stock options, SARs and RSUs	3,359	3,088
Realized losses from sale of marketable securities, net	37	58
Capital loss from sale and disposal of property and equipment		19
Amortization of intangible assets	850	850
Accrued interest and amortization of premium on marketable securities and deposits	356	60
Change in operating assets and liabilities:
Deferred income tax assets and liabilities, net	(268)	16
Trade receivables, net	(3,234)	4,487
Other accounts receivable and prepaid expenses	(47)	(752)
Inventories	1,030	(873)
Long-term prepaid expenses and lease deposits	(78)	(128)
Trade payables	1,195	(1,208)
Accrued compensation and benefits	317	112
Income tax accruals	(59)	(291)
Accrued expenses and other accounts payable	(167)	133
Accrued severance pay, net	(67)	59
Accrued pensions	19	4
Net cash provided by operating activities	2,071	3,091
Cash flows from investing activities:
Purchase of marketable securities	(14,379)	(15,375)
Purchase of short-term deposits	(3,000)	(3,000)
Proceeds from maturity of marketable securities	8,455	9,388
Proceeds from sales of marketable securities	4,810	8,578
Proceeds from redemption of short-term deposits	3,000
Purchases of property and equipment	(778)	(625)
Other investing activities	(104)
Net cash used in investing activities	(1,996)	(1,034)
Cash flows from financing activities:
Issuance of common stock and treasury stock upon exercise of stock options	442	681
Purchase of treasury stock	(5,691)	(2,629)
Net cash used in financing activities	(5,249)	(1,948)
Increase (decrease) in cash and cash equivalents	(5,174)	109
Cash and cash equivalents at the beginning of the year	21,848	17,822
Cash (erosion) due to exchange rate differences	(25)	21
Cash and cash equivalents at the end of the year	$ 16,649	$ 17,952