Note 3. Stock Options and Restricted Stock Units (Details)	3 Months Ended
Mar. 31, 2016 $ / shares shares
Option 1
Exercise Price Range	0.01 - $1.00
Number of Options Outstanding	12,850
Weighted Average Remaining Contractual Life (in Years)	5 years 9 months 22 days
Weighted Average Exercise Price \| $ / shares	$ 0.01
Number of Options Exercisable	12,850
Option 2
Exercise Price Range	1.01 - $2.00
Number of Options Outstanding	4,550
Weighted Average Remaining Contractual Life (in Years)	5 years 1 month 24 days
Weighted Average Exercise Price \| $ / shares	$ 1.70
Number of Options Exercisable	4,550
Option 3
Exercise Price Range	2.01 - $3.00
Number of Options Outstanding	4,000
Weighted Average Remaining Contractual Life (in Years)	2 years 5 months 5 days
Weighted Average Exercise Price \| $ / shares	$ 2.10
Number of Options Exercisable	1,500
Option 4
Exercise Price Range	3.01 - $4.00
Number of Options Outstanding	14,000
Weighted Average Remaining Contractual Life (in Years)	6 years
Weighted Average Exercise Price \| $ / shares	$ 3.33
Number of Options Exercisable	14,000
Option 5
Exercise Price Range	4.01 - $8.00
Number of Options Outstanding	108,750
Weighted Average Remaining Contractual Life (in Years)	5 years 5 months 26 days
Weighted Average Exercise Price \| $ / shares	$ 7.76
Number of Options Exercisable	61,250
Option 6
Exercise Price Range	8.01 - $9.00
Number of Options Outstanding	40,000
Weighted Average Remaining Contractual Life (in Years)	2 years 4 months 20 days
Weighted Average Exercise Price \| $ / shares	$ 8.25
Number of Options Exercisable	27,500
Option 7
Exercise Price Range	9.01 - $10.00
Number of Options Outstanding	12,500
Weighted Average Remaining Contractual Life (in Years)	8 years 8 months 27 days
Weighted Average Exercise Price \| $ / shares	$ 9.26
Number of Options Exercisable	4,170
Option 8
Exercise Price Range	10.01-$13.49
Number of Options Outstanding	40,000
Weighted Average Remaining Contractual Life (in Years)	2 years 11 months 8 days
Weighted Average Exercise Price \| $ / shares	$ 13.49
Number of Options Exercisable	20,000
Total
Number of Options Outstanding	236,650
Weighted Average Remaining Contractual Life (in Years)	4 years 8 months 12 days
Weighted Average Exercise Price \| $ / shares	$ 7.33
Number of Options Exercisable	145,820

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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=6415400&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=6415400&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=6415400&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=6415400&loc=d3e5070-113901

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