Note 4. Stock-based Compensation (Details) - 6 months ended Jun. 30, 2015 - $ / shares	Total
Option 1
Exercise Price Range	0.01 - $1.00
Number of Options Outstanding	19,700
Weighted Average Remaining Contractual Life (in Years)	6 years 6 months 22 days
Weighted Average Exercise Price	$ 0.01
Number of Options Exercisable	19,700
Option 2
Exercise Price Range	1.01 - $2.00
Number of Options Outstanding	4,550
Weighted Average Remaining Contractual Life (in Years)	10 months 24 days
Weighted Average Exercise Price	$ 1.70
Number of Options Exercisable	4,550
Option 3
Exercise Price Range	2.01 - $3.00
Number of Options Outstanding	14,000
Weighted Average Remaining Contractual Life (in Years)	2 years 4 months 6 days
Weighted Average Exercise Price	$ 2.73
Number of Options Exercisable	4,000
Option 4
Exercise Price Range	3.01 - $4.00
Number of Options Outstanding	14,000
Weighted Average Remaining Contractual Life (in Years)	6 years 9 months 4 days
Weighted Average Exercise Price	$ 3.33
Number of Options Exercisable	14,000
Option 5
Exercise Price Range	4.01 - $8.00
Number of Options Outstanding	98,750
Weighted Average Remaining Contractual Life (in Years)	5 years 9 months 25 days
Weighted Average Exercise Price	$ 7.76
Number of Options Exercisable	42,501
Option 6
Exercise Price Range	8.01 - $9.00
Number of Options Outstanding	40,000
Weighted Average Remaining Contractual Life (in Years)	3 years 1 month 24 days
Weighted Average Exercise Price	$ 8.25
Number of Options Exercisable	20,000
Option 7
Exercise Price Range	9.01 - $10.00
Number of Options Outstanding	14,000
Weighted Average Remaining Contractual Life (in Years)	9 years 5 months 26 days
Weighted Average Exercise Price	$ 9.26
Number of Options Exercisable	0
Option 8
Exercise Price Range	10.01-$13.49
Number of Options Outstanding	40,000
Weighted Average Remaining Contractual Life (in Years)	3 years 8 months 12 days
Weighted Average Exercise Price	$ 13.49
Number of Options Exercisable	12,500
Total
Number of Options Outstanding	245,000
Weighted Average Remaining Contractual Life (in Years)	5 years 1 month 28 days
Weighted Average Exercise Price	$ 7.58
Number of Options Exercisable	117,251

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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.

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