Stock-Based Compensation Expense (Tables)

12 Months Ended

Dec. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of the Status And Changes In Stock Option Activities

A summary of the stock option activities related to the Plans, as of and for the year ended December 31, 2022 and 2021 is presented below:

	Number of Options			Weighted Average Exercise Price		Weighted Average Grant Date Fair Value		Weighted Avg Remaining Contractual Life (Years)
Options outstanding as of December 31, 2021		5,754,005		$	11.64			$	6.88
Granted		1,149,018			12.76	$	7.27
Exercised		(202,806	)		4.14		2.13
Forfeited		(196,969	)		13.70		11.93
Expired		(163,690	)		17.04
Options outstanding as of December 31, 2022		6,339,558			11.88				6.48
Exercisable as of December 31, 2022		3,891,871		$	10.56			$	5.06

Summary of Non-Vested Restricted stock unit Activities

A summary of restricted stock unit activities for the year ended December 31, 2022 and 2021 is presented below:

				Weighted
				Average
	Number of			Grant Date
	Shares			Fair Value
Unvested at December 31, 2021		640,479		$	15.46
Granted		80,427			13.37
Vested		(179,700	)		15.57
Forfeited		(48,344	)		15.38
Unvested at December 31, 2022		492,862		$	15.08

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense was classified in the accompanying consolidated statements of operations and comprehensive income (loss) as follows (in thousands):

	Twelve Months Ended December 31,
	2022		2021
Research and development	$	3,064	$	2,620
Selling, general and administrative		7,399		4,061
Cost of goods sold		934		894
	$	11,397	$	7,575

Schedule of Range and Weighted-average Assumptions Used in Black-Scholes Option Pricing Model to Determine the Fair Value of Stock Options

The following table presents the range and weighted-average assumptions, used in the Black-Scholes option pricing model to determine the fair value of stock options:

	Twelve Months Ended December 31,
	2022		2021
	Range	Weighted Average	Range	Weighted Average
Expected volatility	62.4% to 64.9%	63.1%	61.6% to 63.7%	63.2%
Risk-free interest rate	2.0% to 3.8%	2.7%	0.6% to 1.7%	1.0%
Expected life (in years)	6.0 to 10.0 years	6.1 years	5.5 to 10.0 years	6.1 years
Expected dividend yield	0.0%	0.0%	0.0%	0.0%
Grant date fair value	$10.74 to $15.52	$12.73	$12.08 to $19.94	$15.02