Note 4. Equity (Details 1)	9 Months Ended
Sep. 30, 2020 $ / shares shares
Number of options outstanding	104,230
Weighted average remaining contractual life (in years)	6 years 7 months 24 days
Weighted average exercise price \| $ / shares	$ 12.48
Number of options exercisable	89,730
Option 1
Exercise price range	$0.01 - $7.00
Number of options outstanding	10,000
Weighted average remaining contractual life (in years)	5 years 1 month 20 days
Weighted average exercise price \| $ / shares	$ 6.80
Number of options exercisable	10,000
Option 2
Exercise price range	$7.01 - $8.00
Number of options outstanding	15,313
Weighted average remaining contractual life (in years)	2 years 11 months 26 days
Weighted average exercise price \| $ / shares	$ 7.76
Number of options exercisable	15,313
Option 3
Exercise price range	$8.01 - $12.00
Number of options outstanding	7,167
Weighted average remaining contractual life (in years)	6 years 1 month 17 days
Weighted average exercise price \| $ / shares	$ 9.88
Number of options exercisable	5,167
Option 4
Exercise price range	$12.01 - $15.00
Number of options outstanding	47,750
Weighted average remaining contractual life (in years)	7 years 8 months 12 days
Weighted average exercise price \| $ / shares	$ 13.10
Number of options exercisable	35,250
Option 5
Exercise price range	$15.01 - $17.40
Number of options outstanding	24,000
Weighted average remaining contractual life (in years)	7 years 8 months 1 day
Weighted average exercise price \| $ / shares	$ 17.40
Number of options exercisable	24,000

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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.

+ References

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Paragraph 2
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