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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Fair Value of Stock Options Determined on Grant Date Using Black Scholes Option-Pricing Model

The assumptions that the Company used in the Black Scholes option-pricing model to determine the grant date fair value of stock options granted to employees and non-employees were as follows, presented on a weighted-average basis:

		Year Ended December 31,
		2020				2019
Risk-free interest rate			0.45	%			1.94	%
Expected term (in years)		6.07					6.10
Expected volatility			72.26	%			71.41	%
Expected dividend yield			0.00	%			0.00	%

Schedule of Stock Option Activity

The following table summarizes the Company’s stock option activity:

		2020																2019
		Number of shares				Weighted average exercise price				Weighted average remaining contractual term (in years)				Intrinsic value (in thousands)				Number of shares				Weighted average exercise price				Weighted average remaining contractual term (in years)
Outstanding,    January 1			3,505,119			$	2.07				8.98								907,315			$	1.66				8.55
Granted			1,083,274			$	18.57												2,761,034			$	2.21
Exercised			(416,157	)		$	1.92												-			$	-
Forfeited			(40,113	)		$	3.91												(163,230	)		$	2.06
Outstanding,    December 31			4,132,123			$	6.39				8.64			$	115,328				3,505,119			$	2.07				8.98
Options    exercisable,    December 31			1,217,497			$	1.96				7.87			$	39,374				611,927			$	1.69				6.75
Options unvested,    December 31			2,914,626			$	8.25				8.96			$	75,926				2,893,192			$	2.15				9.45

Schedule of Share-based Compensation Expense

Share-based compensation expense was allocated as follows:

		Year Ended December 31,
		2020				2019
		(in thousands)
Research and development		$	890			$	250
General and administrative			1,647				261
Total share-based compensation expense		$	2,537			$	511

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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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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