Stock Option Plans (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Stock Option Activity Under Stock Option Plan

Stock option activity under the Company's stock options plans for the years ending December 31, 2023 and 2022 were as follows:

(in thousands, except share and per share data)	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Contractual Term (Years)		Aggregate Intrinsic Value
Outstanding, December 31, 2021		711,058		$	43.05
Granted		313,167			16.14
Exercised		(1,750	)		12.00
Cancelled		(328,566	)		50.10
Outstanding, December 31, 2022		693,909		$	27.60
Granted		259,122			7.35
Cancelled		(487,133	)		17.70
Outstanding, December 31, 2023		465,898		$	26.85		7.81	$	—
Options exercisable, December 31, 2023		415,376		$	28.80		7.64	$	—
Options available for future grant, December 31, 2023		1,302,411

Summary of Non-Vested Restricted Stock

A summary of the status of restricted stock as of December 31, 2023 and 2022 is as follows:

	Number of Shares			Weighted-Average Grant Date Fair Value
Unvested, December 31, 2021		79,905		$	31.54
Granted		18,667			12.30
Vested		(20,441	)		34.21
Cancelled		(15,527	)		47.23
Unvested, December 31, 2022		62,604		$	21.04
Vested		(33,322	)		17.94
Cancelled		(29,282	)		24.60
Unvested, December 31, 2023		—		$	—