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Stockholders' Equity (Deficit) (Tables)

9 Months Ended

Aug. 06, 2021

Sep. 30, 2022

Stockholders' Equity Note [Abstract]

Summary of Avenue Warrant Valued Using the Black-Scholes Option Pricing Method

The Avenue Warrant was valued at issuance at $1.3 million using the Black-Scholes option pricing method using the following assumptions:

		August 6, 2021
Contractual term (years)			5.07
Expected volatility			187.0	%
Risk-free interest rate			0.77	%
Expected dividends			0.00	%

The Company values stock options using the Black-Scholes option pricing model and used the following assumptions:

		Nine months ended September 30,
		2022		2021
Expected terms (years)		0.7 - 8.4		5.1 - 6.3
Expected volatility		166.4% - 180.3%		178.3% - 181.3%
Risk-free interest rate		1.8% - 2.9%		0.7% - 1.1%
Expected dividends		0.00%		0.00%

Summary of Stock Option Activity

The following is a summary of stock option activity for the nine months ended September 30, 2022:

		Number of Options				Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Term (in years)				Aggregate Intrinsic Value
Outstanding at January 1, 2022			1,732,460			$	11.69
Granted			650,083				7.05
Expired			(36,628	)			10.44
Cancelled/Forfeited			(95,960	)			9.69
Outstanding at September 30, 2022			2,249,955			$	10.46				8.4			$	—
Exercisable at September 30, 2022			1,143,154			$	11.27				8.1			$	—

Summary of Stock Option Shares Outstanding and Exercisable

The following table summarizes information for stock option shares outstanding and exercisable at September 30, 2022:

						Options Exercisable
Range of Exercise Prices		Outstanding Number of Options				Weighted Average Remaining Option Term (in years)				Number of Options
$6.24 - $53.85			2,249,456				8.4				1,142,655
$53.85+			499				6.3				499
			2,249,955				8.1				1,143,154

Summary of Recognized Share-based Compensation Cost

The following is a summary of share-based compensation expense in the statement of operations for the three and nine months ended September 30, 2022 and 2021 (in thousands):

		Three months ended September 30								Nine months ended September 30,
		2022				2021				2022				2021
Selling, general and administrative		$	857			$	1,655			$	2,816			$	4,245
Research and development			346				734				1,370				1,827
Cost of goods sold			52				60				160				152
Total		$	1,255			$	2,449			$	4,346			$	6,224

Summary of Warrant Activity

The following is a summary of warrant activity for the nine months ended September 30, 2022:

		Warrants				Weighted Average Exercise Price				Weighted Average Remaining Life (in years)
Outstanding at January 1, 2022			3,894,498			$	9.27
Warrants issued			566,751				.01
Warrants exercised			—				—
Warrants expired			—				—
Outstanding at September 30, 2022			4,461,249			$	8.09				2.8
Exercisable at September 30, 2022			4,461,249			$	8.09				2.8

Schedule of Information Related to Stock Warrants Outstanding and Exercisable

The following table presents information related to stock warrants at September 30, 2022:

						Warrants Exercisable
Range of Exercise Prices		Outstanding Number of Warrants				Weighted Average Remaining Warrant Term				Number of Warrants
$0.01			850,506				4.3				850,506
$10.00			3,610,743				2.4				3,610,743
			4,461,249				2.8				4,461,249

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Schedule of Information Related to Stock Warrants Outstanding and Exercisable.

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