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Stock Option Plans (Tables)

6 Months Ended

Jun. 30, 2020

Stock Option Plans

Summary of stock option activity

​

​	​	​	​	​	​	​	​
​	​	​	​	Options Outstanding
​		​		​		Weighted ‑
​	​	Shares	​	​	​	Average
​	​	Available	​	Number of	​	Exercise
​		for Grant		Options		Price
Balance at December 31, 2019		1,704,183		5,643,410	​	$	8.05
Additional shares authorized		1,118,000		—	​		—
Options granted		(190,000)		190,000	​		2.68
Options exercised		—		(81,500)	​		0.28
Options forfeited		190,812		(190,812)	​		7.07
Balance at June 30, 2020		2,822,995		5,561,098	​	$	8.01

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- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
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