Interim Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 8,774	$ 4,182
Adjustments required to reconcile net income to net cash provided by operating activities:
Depreciation	253	258
Equity-based compensation	2,125	1,124
Gain from sale of property and equipment	(10)
Gain on available-for-sale marketable securities	(7)	(14)
Amortization of premiums on available-for-sale marketable securities	1,045	718
Accrued interest on short term bank deposits	(457)	(322)
Unrealized foreign exchange loss (gain)	44	(51)
Changes in operating assets and liabilities:
Decrease in trade receivables	2,284	449
Decrease in prepaid expenses and other accounts receivable	1,184	1,268
Increase in deferred tax, net	(1,693)	(176)
Increase in trade payables	226	131
Increase in deferred revenues	3,030	95
Decrease in accrued expenses and other payables	(1,206)	(1,706)
Excess tax benefit from stock-based compensation	(1,779)
Decrease in accrued severance pay, net	(11)	(6)
Net cash provided by operating activities	13,802	5,950
Cash flows from investing activities:
Purchase of property and equipment	(213)	(456)
Proceeds from sale of property and equipment	10
Investment in bank deposits	(22,500)	(19,432)
Proceeds from bank deposits	5,065	32,625
Investment in available-for-sale marketable securities	(27,600)	(35,448)
Proceeds from maturity of available-for-sale marketable securities	16,477	13,339
Proceeds from sale of available-for-sale marketable securities	3,998	10,189
Net cash provided by (used in) investing activities	(24,763)	817
Cash flows from financing activities:
Purchase of Treasury Stock		(1,207)
Proceeds from issuance of Common Stock upon exercise of stock options	6,046	4,028
Proceeds from issuance of Common Stock under employee stock purchase plan	590	525
Proceeds from issuance of Treasury Stock upon exercise of stock options		52
Excess tax benefit from stock-based compensation	1,779
Net cash provided by financing activities	8,415	3,398
Effect of exchange rate movements on cash	(173)	(41)
Increase (decrease) in cash and cash equivalents	(2,719)	10,124
Cash and cash equivalents at the beginning of the period	17,098	12,104
Cash and cash equivalents at the end of the period	$ 14,379	$ 22,228

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified equity-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element reduces net cash provided by operating activities.

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The aggregate unrealized foreign currency transaction gain (loss) (pretax) included in determining net income for the reporting period. Represents the aggregate of gains (losses) on transactions that are unsettled as of the balance sheet date, which is therefore an adjustment to reconcile income (loss) from continuing operations to net cash provided by or used in continuing operations. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting entity's financial statements. For certain entities, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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