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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Stock-Based Compensation

Schedule of assumptions in its application of the Black-Scholes option pricing model for grants

​

​	​	​	​	​
​	​	Year Ended December 31,
​		2021		2020
​	​	​	​	​
Weighted-average risk-free interest rate	​	0.89% - 1.71%	​	0.36% - 1.45%
Expected term (in years)	​	5.83 - 10 years	​	5.92 - 10 years
Expected dividend yield	​	0%	​	0%
Expected volatility	​	66.76% - 80.99%	​	67.30% - 80.85%

Summary of stock option activity

​

​	​	​	​	​	​	​	​	​	​	​
​		​		​	​	​	Weighted		​	​
​	​	​	​	Weighted-		​	Average	​	​	​
​	​	​	​	Average		​	Remaining	​	​	​
​	​	Number of	​	Exercise Price		​	Contractual	​	Aggregate
​	​	Options	​	per Share			Term (in Years)	​	Intrinsic Value
​				​					​
Outstanding at of December 31, 2020		1,801,263	​	$	3.01		​		​
Granted		1,452,462	​	​	10.07	​	​		​
Exercised		(117,847)	​	​	3.01	​	​		​
Cancelled		(276,334)	​	​	3.58	​	​		​
Outstanding at December 31, 2021		2,859,544	​	$	6.55	​	8.30	​	$	27,615,466
​		​	​	​	​	​	​	​	​	​
Vested and exercisable at December 31, 2021		1,102,543	​	$	3.01		7.14	​	$	14,507,723
Vested and expected to vest at December 31, 2021	​	2,859,544	​	$	6.55		8.30	​	$	27,615,466

Summary of recognized share-based compensation expense recognized

​

​	​	​	​	​	​	​	​
​	​	Year Ended December 31,					​
​		2021			2020
​	​	​	​	​	​	​	​
Cost of revenue	​	$	103,329	​	$	108,027	​
Research and development	​		768,679	​		503,111	​
General and administrative	​		930,615	​		475,631	​
Total	​	$	1,802,623	​	$	1,086,769	​

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Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

+ References

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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.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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