Note 3. Stock Options and Restricted Stock Units (Details)	6 Months Ended
Jun. 30, 2017 $ / shares shares
Option 1
Exercise Price Range	$0.01 - $1.00
Number of Options Outstanding	7,850
Weighted Average Remaining Contractual Life (in Years)	4 years 6 months 18 days
Weighted Average Exercise Price \| $ / shares	$ 0.01
Number of Options Exercisable	7,850
Option 2
Exercise Price Range	$1.01 - $7.00
Number of Options Outstanding	10,000
Weighted Average Remaining Contractual Life (in Years)	8 years 4 months 20 days
Weighted Average Exercise Price \| $ / shares	$ 6.80
Number of Options Exercisable	4,167
Option 3
Exercise Price Range	$7.01 - $8.00
Number of Options Outstanding	62,188
Weighted Average Remaining Contractual Life (in Years)	3 years 14 days
Weighted Average Exercise Price \| $ / shares	$ 7.76
Number of Options Exercisable	57,189
Option 4
Exercise Price Range	$8.01 - $10.00
Number of Options Outstanding	5,667
Weighted Average Remaining Contractual Life (in Years)	7 years 5 months 26 days
Weighted Average Exercise Price \| $ / shares	$ 9.26
Number of Options Exercisable	4,167
Option 5
Exercise Price Range	$10.01 - $13.49
Number of Options Outstanding	40,000
Weighted Average Remaining Contractual Life (in Years)	1 year 8 months 8 days
Weighted Average Exercise Price \| $ / shares	$ 13.49
Number of Options Exercisable	32,500
Total
Number of Options Outstanding	125,705
Weighted Average Remaining Contractual Life (in Years)	3 years 3 months 29 days
Weighted Average Exercise Price \| $ / shares	$ 9.09
Number of Options Exercisable	105,873

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-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=96867065&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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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