Shareholders' Equity (Options, Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares
Number of options (000's)
Beginning balance (in shares) \| shares	2,683
Issued (in shares) \| shares	1,053
Exercised (in shares) \| shares	(603)
Expired / Forfeited (in shares) \| shares	(65)
Ending balance (in shares) \| shares	3,068	2,683
Weighted average exercise price(1)
Beginning balance (USD per share) \| $ / shares	$ 3.36
Issued (USD per share) \| $ / shares	6.10
Exercised (USD per share) \| $ / shares	3.20
Expired / Forfeited (USD per share) \| $ / shares	4.81
Ending balance (USD per share) \| $ / shares	$ 4.29	$ 3.36
Weighted average remaining contractual life
Weighted average remaining contractual life	8 years 1 month 6 days	6 years 8 months 12 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value \| $	$ 13,867	$ 7,790

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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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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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-Name Accounting Standards Codification
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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 per share amount at which grantees can acquire shares of common stock by exercise of options.

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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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Number of share options (or share units) exercised during the current period.

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value [Abstract]

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