Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 20,544	$ 23,578
Restricted deposits	623	77
Marketable securities and short-term deposits (Note 3)	11,508us-gaap_ShortTermInvestments	13,895us-gaap_ShortTermInvestments
Trade receivables, net	20,298us-gaap_AccountsReceivableNetCurrent	21,195us-gaap_AccountsReceivableNetCurrent
Other accounts receivable and prepaid expenses (Note 4)	1,902	2,641
Inventories (Note 5)	15,635us-gaap_InventoryNet	12,334us-gaap_InventoryNet
Deferred income taxes (Note 15)	775us-gaap_DeferredTaxAssetsNetCurrent	92us-gaap_DeferredTaxAssetsNetCurrent
Total current assets	71,285us-gaap_AssetsCurrent	73,812us-gaap_AssetsCurrent
PROPERTY AND EQUIPMENT, NET (Note 6)	2,843us-gaap_PropertyPlantAndEquipmentNet	2,837us-gaap_PropertyPlantAndEquipmentNet
LONG-TERM ASSETS:
Long-term marketable securities (Note 3)	92,269us-gaap_LongTermInvestments	90,162us-gaap_LongTermInvestments
Long-term prepaid expenses and lease deposits	1,162	100
Deferred income taxes (Note 15)	149
Severance pay fund	10,860us-gaap_OtherInterestEarningAssets	11,168us-gaap_OtherInterestEarningAssets
Investment in other company (Note 9)	2,200us-gaap_CostMethodInvestments	2,200us-gaap_CostMethodInvestments
Intangible assets, net (Note 7)	5,135	6,710
Goodwill	5,276us-gaap_Goodwill	5,276us-gaap_Goodwill
	117,051us-gaap_AssetsNoncurrent	115,616us-gaap_AssetsNoncurrent
Total assets	191,179us-gaap_Assets	192,265us-gaap_Assets
CURRENT LIABILITIES:
Trade payables	15,282us-gaap_AccountsPayableCurrent	14,149us-gaap_AccountsPayableCurrent
Accrued compensation and benefits	9,408	9,845
Income tax accruals and payables	1,151us-gaap_AccruedIncomeTaxesCurrent	1,985us-gaap_AccruedIncomeTaxesCurrent
Accrued expenses and other accounts payable (Note 10)	5,852	5,532
Total current liabilities	31,693us-gaap_LiabilitiesCurrent	31,511us-gaap_LiabilitiesCurrent
LONG-TERM LIABILITIES:
Deferred income taxes (Note 15)	845	1,183
Accrued severance pay	10,929	11,179
Accrued pensions (Note 11)	1,089	981
Total long-term liabilities	12,863us-gaap_LiabilitiesNoncurrent	13,343us-gaap_LiabilitiesNoncurrent
COMMITMENTS AND CONTINGENCIES (Note 14)
STOCKHOLDERS' EQUITY (Note 13):
Common stock, $0.001 par value - Authorized: 50,000,000 shares at December 31, 2014 and 2013; Issued and outstanding: 21,843,950 and 22,349,780 shares at December 31, 2014 and 2013, respectively	22us-gaap_CommonStockValue	22us-gaap_CommonStockValue
Additional paid-in capital	355,906us-gaap_AdditionalPaidInCapital	350,494us-gaap_AdditionalPaidInCapital
Treasury stock at cost	(122,387)us-gaap_TreasuryStockValue	(118,749)us-gaap_TreasuryStockValue
Accumulated other comprehensive loss	(1,566)	(821)
Accumulated deficit	(85,352)	(83,535)
Total stockholders' equity	146,623us-gaap_StockholdersEquity	147,411us-gaap_StockholdersEquity
Total liabilities and stockholders' equity	$ 191,179	$ 192,265

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Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.

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Amount of obligation due after one year or beyond the normal operating cycle, if longer.

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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Carrying value as of the balance sheet date of obligations, including trade payables, incurred through that date and due within one year (or in the operating cycle if longer) arising from transactions not otherwise specified in the taxonomy.

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No definition available.

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The amount of other interest earning assets not otherwise specified in the taxonomy.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 7

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The current cash, cash equivalents and investments that are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes current cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal.

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-Topic 210

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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-Name Regulation S-X (SX)

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Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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-Section 02

-Paragraph 29, 30, 31

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Liability for amount due employees, in addition to wages and any other money that employers owe employees, when their employment ends through a layoff or other termination. For example, a company may provide involuntarily terminated employees with a lump sum payment equal to one week's salary for every year of employment.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Postemployment Benefits

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

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-Publisher FASB

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