Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ (1,637)	$ (2,874)
Adjustments required to reconcile net income to net cash provided by operating activities:
Depreciation	1,255	1,355
Equity-based compensation expenses related to employees’ stock options, SARs and RSUs	5,111	4,526
Realized losses from sale of marketable securities, net	36	59
Capital loss from sale and disposal of property and equipment		19
Amortization of intangible assets	1,276	1,275
Accrued interest and amortization of premium on marketable securities and deposits	548	386
Change in operating assets and liabilities:
Deferred income tax assets and liabilities, net	(92)	(56)
Trade receivables, net	(8,067)	(858)
Other accounts receivable and prepaid expenses	305	(801)
Inventories	1,146	(912)
Long-term prepaid expenses and lease deposits	(123)	(154)
Trade payables	737	(554)
Accrued compensation and benefits	1,038	719
Income tax accruals	(366)	(231)
Accrued expenses and other accounts payable	849	(659)
Accrued severance pay, net	(9)	124
Accrued pensions	28	14
Net cash provided by operating activities	2,035	1,379
Cash flows from investing activities:
Purchase of marketable securities	(18,992)	(28,812)
Purchase of short-term deposits	(5,000)	(3,000)
Proceeds from maturity of marketable securities	14,399	18,474
Proceeds from sales of marketable securities	4,810	12,988
Proceeds from redemption of short-term deposits	3,000	425
Purchases of property and equipment	(946)	(715)
Other investing activities	(104)
Net cash used in investing activities	(2,833)	(640)
Cash flows from financing activities:
Issuance of common stock and treasury stock upon exercise of stock options	455	959
Purchase of treasury stock	(9,610)	(4,365)
Net cash used in financing activities	(9,155)	(3,406)
Increase (decrease) in cash and cash equivalents	(9,953)	(2,667)
Cash and cash equivalents at the beginning of the year	21,848	17,822
Cash (erosion) due to exchange rate differences	(33)	57
Cash and cash equivalents at the end of the year	$ 11,862	$ 15,212