7. Share-based Compensation (Details) - 6 months ended Jun. 30, 2015 - Common stock options - $ / shares	Total
Number of Shares
Outstanding at beginning of year, Shares	1,390,770
Granted, Shares	1,280,881
Exercised, Shares	(69,999)
Forfeited, Shares	0
Expired, Shares	$ 0
Outstanding at June 30, 2015	2,601,652
Stock options exercisable at June 30, 2015	1,214,517
Wtd. Avg Exercise Price
Outstanding at beginning of year, Wtd. Avg. Shares Exercise Price	$ 1.50
Granted, Wtd. Avg. Shares Exercise Price	2.06
Exercised, Wtd. Avg. Shares Exercise Price	1.14
Forfeited, Wtd. Avg. Shares Exercise Price	0
Expired, Wtd. Avg. Shares Exercise Price	0
Outstanding at June 30, 2015, Wtd. Avg. Shares Exercise Price	1.79
Stock options exercisable at June 30, 2015, Wtd. Avg. Shares Exercise Price	$ 1.39

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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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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