Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Schedule of Stock-based Compensation Expense

The following table sets forth the Company’s equity classified stock-based compensation expense for the periods indicated (in thousands):

	Three Months Ended March 31,
	2024		2023
Cost of production	$	13	$	18
General and administrative		3,688		3,923
Other		532		736
Total stock-based compensation	$	4,233	$	4,677

Schedule Stock Option Award Activity

Stock option activity under the Company’s stock incentive plans and changes during the three months ended March 31, 2024, were as follows:

				Weighted-
				Average
		Weighted-		Remaining
		Average		Contractual		Aggregate
	Number of	Exercise		Term		Intrinsic
	Options	Price (1)		(years)		Value
Options outstanding at December 31, 2023	8,109,123	$	3.51		8.8	$	—
Granted	—	$	—			$	—
Canceled or forfeited	(145,190)	$	2.74			$	—
Exercised	—	$	—			$	—
Options outstanding at March 31, 2024	7,963,933	$	3.53		8.6	$	—
Options vested and expected to vest at March 31, 2024	3,001,384	$	4.80		7.8	$	—

(1) Exercise price of options outstanding ranges from $1.15 to $876 as of March 31, 2024. The higher end of the range is due to the impact of several reverse stock splits during the years 2015 to 2018.

Schedule of Non-vested Restricted Stock Awards

The Company periodically grants restricted stock awards to employees and directors. The vesting period for restricted stock awards granted may be based upon a service period or based upon the attainment of performance objectives. The Company recognizes stock-based compensation over the vesting period, which for awards that vest based on a service period is generally two to three years.

		Weighted-
		Average
	Number of	Grant-Date
	Shares	Fair Value
Outstanding at December 31, 2023	6,159,341	$	2.30
Granted	668,281	$	0.97
Vested and issued	(236,394)	$	1.45
Canceled or forfeited	(108,403)	$	1.99
Non-vested at March 31, 2024	6,482,825	$	2.21