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SHAREHOLDERS' EQUITY - Summary of the Company's stock option activity and related information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
SHAREHOLDERS' EQUITY
Amount of options, outstanding at beginning of year	1,852,661
Amount of options, Granted	210,500
Amount of options, Exercised	(695,255)
Amount of options, Forfeited	(26,833)
Amount of options, outstanding at end of year	1,341,073	1,852,661
Amount of options, exercisable at end of year	773,983
Weighted average exercise price, outstanding at beginning of year	$ 5.38
Weighted average exercise price, Granted	12.95
Weighted average exercise price, Exercised	4.43
Weighted average exercise price, Forfeited	7.09
Weighted average exercise price, Options outstanding at end of year	7.03	$ 5.38
Weighted average exercise price, Option exercisable at end of year	$ 5.59
Weighted average remaining contractual term, Options outstanding (in years)	3 years 10 months 24 days	3 years 10 months 24 days
Weighted average remaining contractual term, Options exercisable at end of year (in years)	2 years 9 months 18 days
Aggregate intrinsic value, outstanding	$ 8,354
Aggregate intrinsic value, outstanding	25,021	$ 8,354
Aggregate intrinsic value, Options exercisable at end of year	$ 15,560

X

- Definition

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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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 weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock 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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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