5. Stock Options (Details) - EUR (€) € / shares in Units, € in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Number of options outstanding, beginning	26,750,000	29,100,000
Granted	0	0
Exercised	0	0
Expired/forfeited	(1,000,000)	(2,350,000)
Number of options outstanding, ending	25,750,000	26,750,000
Number of options exercisable	25,750,000
Weighted average exercise price outstanding, beginning	€ .0273	€ 0.0364
Granted	.0000	.0000
Exercised	.0000	.0000
Expired/forfeited	.1900	.1400
Weighted average exercise price outstanding, ending	.0210	.0273
Weighted average exercise price exercisable	€ 0.0210
Weighted average remaining contractual life outstanding	3 years 4 months 17 days
Weighted average remaining contractual life exercisable	3 years 3 months 11 days
Aggregate intrinsic value outstanding	€ 1,494,350
Aggregate intrinsic value exercisable	€ 1,494,350
Minimum
Weighted average exercise price outstanding, beginning	€ .0200	.0200
Granted
Exercised
Expired/forfeited
Weighted average exercise price outstanding, ending	.0200	.0200
Weighted average exercise price exercisable	.0200
Maximum
Weighted average exercise price outstanding, beginning	.1900	.1900
Granted
Exercised
Expired/forfeited
Weighted average exercise price outstanding, ending	.0230	€ .1900
Weighted average exercise price exercisable	€ .0230

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 of the plan that expired.

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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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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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