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Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Stock Based Compensation

Summary of Activity Related to Stock Options

	Number of Options (in thousands)				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (Years)
Outstanding, January 1, 2023	$	440			$	55.65				7.5
Granted		3
Exercised		—
Cancelled		(6	)
Outstanding, March 31, 2023	$	437			$	55.74				7.2
Exercisable, March 31, 2023	$	284			$	75.84				6.7

Summary of Activity Related to Restricted Stock and Deferred Stock Units Granted

		Number of Shares (in thousands)				Weighted Average Grant Date Fair Value
Nonvested, January 1, 2023			127			$	11.85
Granted			—
Vested			(4	)
Cancelled			—
Nonvested, March 31, 2023			123			$	11.81

Schedule of Recognized Stock Compensation for Equity Awards

			Three months ended March 31,
(in thousands)		2023				2022
Selling, general and administrative		$	510			$	705
Research and development			57				66
Cost of goods sold			5				6
Total expense		$	572			$	777

Summary of Weighted Average Assumptions Used in Valuing Plans

	Three months ended March 31,
	2023					2022
Fair value at grant date	$	3.46			$	8.10
Expected volatility	114.0		%			84.0	%
Risk-free interest rate	3.9		%			1.6	%
Expected holding period, in years	6.0					6.0
Dividend yield		—	%			—	%

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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 of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year.

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