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Equity Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2021

Summary of company's stock options activity and related information

A summary of the Company’s stock option activity and related information is as follows:

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​

​

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2021

​

2020

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​

​

​

Weighted

​

​

​

Weighted

​

​

​

​

Weighted

​

Average

​

​

​

Weighted

​

Average

​

​

​

​

Average

​

Remaining

​

​

​

Average

​

Remaining

​

​

Stock

​

Exercise

​

Life

​

Stock

​

Exercise

​

Life

​

​

Options

​

Price

​

(in years)

​

Options

​

Price

​

(in years)

Outstanding at January 1

391,650

​

$

5.70

8.1

169,980

​

$

8.13

9.1

Granted

131,821

​

$

11.42

226,691

​

$

4.84

Exercised

(27,934)

​

$

3.27

—

​

Forfeited / Expired

(2,651)

​

$

8.04

(5,021)

​

$

49.39

Outstanding at December 31

492,886

​

$

7.35

7.6

391,650

​

$

5.70

8.1

Exercisable at December 31

378,470

​

$

6.17

7.1

364,567

​

$

5.91

8.0

Schedule of additional information about stock options outstanding

The following table sets forth additional information about stock options outstanding at December 31, 2021:

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​	​	​	​	​	​	​	​	​	​
​		​		Weighted		​	​		​
​	​	​	​	Average	​	Weighted		​	​
​	​	​	​	Remaining	​	Average		​	​
​	​	Options	​	Life	​	Exercise		​	Options
Range of Exercise Prices	​	Outstanding	​	(in years)	​	Price		​	Exercisable
$1.99 – $2.85		184,557		6.5	​	$	2.51		170,641
$4.25 – $8.04		161,770		8.6	​	$	7.09		161,270
$10.41 – $17.25		142,206		8.0	​	$	12.67		42,206
$31.50 – $79.40		4,353		4.6	​	$	48.50		4,353
​		492,886			​				378,470

Employee Stock Option [Member]

Schedule of assumptions used in the black-scholes model

The assumptions used in the Black-Scholes model are as follows:

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​	​	​	​	​	​
​	​	For the year ended December 31,
​		2021		2020
Average risk-free interest rate		0.97	%	0.83	%
Expected dividend yield		—	%	—	%
Expected life		5.31 to 6.00 years		5.00 to 6.25 years	​
Expected volatility		90	%	90	%

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- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

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-Topic 718
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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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