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SHAREHOLDERS' EQUITY (Summary Of Stock Options Granted) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Number of options
Outstanding at beginning of year	6,751,606
Granted	1,435,333
Exercised	(422,311)
Forfeited or expired	(689,028)
Outstanding at end of year	7,075,600	6,751,606
Options exercisable at end of the year	4,568,753
Vested and expected to vest	6,635,385
Weighted average exercise price
Outstanding at beginning of year	$ 3.99
Granted	2.46
Exercised	1.42
Forfeited or expired	5.97
Outstanding at end of year	3.64	$ 3.99
Options exercisable at end of the year	4.25
Vested and expected to vest	$ 3.77
Weighted-average remaining contractual term
Outstanding at end of year	3 years 3 months 19 days	3 years 5 months 20 days
Options exercisable at end of the year	2 years 5 months 1 day
Vested and expected to vest	3 years 2 months 1 day
Aggregate intrinsic value
Outstanding at beginning of year	$ 7,937
Outstanding at end of the year	1,366	$ 7,937
Options exercisable at end of the year	1,242
Vested and expected to vest	$ 1,362

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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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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.

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Gross number of share options (or share units) granted during the period.

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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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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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