SHAREHOLDERS' EQUITY (Schedule of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
Jun. 30, 2013
Number of options (in thousands)
Outstanding at December 31, 2012	1,670
Granted	68
Exercised	(50)
Cancelled or forfeited	(41)
Outstanding at June 30, 2013	1,647
Exercisable at June 30, 2013	1,257
Vested and expected to vest at June 30, 2013	1,620
Weighted average exercise price (per share)
Outstanding at December 31, 2012	$ 2.44
Granted	$ 6.47
Exercised	$ 2.29
Cancelled or forfeited	$ 4.51
Outstanding at June 30, 2013	$ 2.56
Exercisable at June 30, 2013	$ 2.31
Vested and expected to vest at June 30, 2013	$ 2.55
Weighted-average remaining contractual term (in years)
Outstanding at June 30, 2013	2 years 8 months 27 days
Exercisable at June 30, 2013	2 years 2 months 5 days
Vested and expected to vest at June 30, 2013	2 years 8 months 16 days
Aggregate intrinsic value
Outstanding at June 30, 2013	$ 5,700
Exercisable at June 30, 2013	4,719
Vested and expected to vest at June 30, 2013	$ 5,638
Weighted average fair value of options granted	$ 3.8

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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