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Shareholders' Equity (Stock Options Activity Roll-forward) (Details)	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Options Outstanding - Number of Shares
Options outstanding as of December 31, 2019: | shares	533,484
Granted | shares	234,000
Exercised | shares	(25,563)
Canceled and forfeited | shares	(4,896)
Expired | shares	(17,958)
Options outstanding as of December 31, 2020: | shares	719,067
Options Outstanding - Weighted Average Exercise Price
Options outstanding as of December 31, 2019: | $ / shares	$ 2.87
Granted | $ / shares	2.00
Exercised | $ / shares	2.74
Canceled and forfeited | $ / shares	3.98
Expired | $ / shares	5.16
Options outstanding as of December 31, 2020: | $ / shares	$ 2.53

X

- Definition

Weighted average exercise price at which stock options awarded expired in the current period.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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