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Stockholders' Equity (Deficit) (Tables)

6 Months Ended

Aug. 06, 2021

Jun. 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 during the reporting periods:

		Six months ended June 30,
		2022		2021
Expected terms (years)		5.23 - 6.46		5.86
Expected volatility		174.81% -180.33%		178.33
Risk-free interest rate		1.75% -2.93%		0.9%
Expected dividends		0.00%		0.00%

Summary of Stock Option Activity

The following is a summary of stock option activity for the six months ended June 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			(29,116	)			10.73
Cancelled/Forfeited			(42,034	)			10.35
Outstanding at June 30, 2022			2,311,393			$	10.42				8.7			$	—
Exercisable at June, 2022			952,670			$	11.48				8.4			$	—

Summary of Stock Option Shares Outstanding and Exercisable

The following table summarizes information for stock option shares outstanding and exercisable at June 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			2,310,894				8.7				952,171
$53.85+			499				6.6				499
			2,311,393				8.4				952,670

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 six months ended June 30, 2022 and 2021 (in thousands):

		Three months ended June 30,								Six months ended June 30,
		2022				2021				2022				2021
Selling, general and administrative		$	918			$	1,124			$	1,958			$	2,590
Research and development			503				463				1,025				1,093
Cost of goods sold			52				39				108				91
Total		$	1,473			$	1,626			$	3,091			$	3,774

Summary of Warrant Activity

The following is a summary of warrant activity for the six months ended June 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			—				—
Warrants exercised			—				—
Warrants expired			—				—
Outstanding at June 30, 2022			3,894,498			$	9.27				2.7
Exercisable at June 30, 2022			3,894,498			$	9.27				2.7

Schedule of Information Related to Stock Warrants Outstanding and Exercisable

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

						Warrants Exercisable
Range of Exercise Prices		Outstanding Number of Warrants				Weighted Average Remaining Warrant Term (in years)				Number of Warrants
$0.01			283,755				3.4				283,755
$10.00			3,610,743				2.7				3,610,743
			3,894,498				2.7				3,894,498

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Schedule of Information Related to Stock Warrants Outstanding and Exercisable.

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