Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense

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

	Year Ended December 31,
	2022		2021
Equity Classified Awards
Cost of production	$	(25)	$	43
General and administrative	14,342		5,631
Other	2,618		2,026
Total equity classified awards	16,935		7,700
Liability Classified Awards
General and administrative	—		2,165
Other	—		9
Total liability classified awards	—		2,174
Total stock-based compensation	$	16,935	$	9,874

Schedule Stock Option Award Activity

Stock option award activity. Stock option activity under the Company’s stock incentive plans and changes during the year ended December 31, 2022 were as follows:

	Number of Options	Weighted Average Exercise Price (1)		Weighted Average Remaining Contractual Term (years)	Aggregate Intrinsic Value
Options outstanding at December 31, 2021	4,746,368	$	5.11		$	—
Granted	1,627,683	$	3.45
Canceled or forfeited	(428,730)	$	5.49
Exercised	—	$	—
Options outstanding at December 31, 2022	5,945,321	$	4.65	9.1	$	—
Options vested and expected to vest at December 31, 2022	1,512,054	$	5.32	8.7	$	—

(1)Exercise price of options outstanding range from $2.42 to $11,340 as of December 31, 2022. The higher end of the range is due to the impact of several reverse stock splits during the years 2015 to 2018, subsequent to certain option grants, and relates to awards that expire during 2023.

Schedule of Stock Option Pricing Assumptions

The following table sets forth the weighted average Black-Scholes option pricing model assumptions (no dividends were expected) and resulting grant date fair value for the stock options granted during the years ended December 31, 2022 and 2021:

	Year Ended December 31,
	2022			2021
Risk-free interest rate	2.90		%	0.92		%
Expected volatility factor	134		%	141		%
Expected option life (years)	6.0			5.9
Weighted-average fair value	$	2.18		$	4.59

Schedule of Non-vested Restricted Stock Awards

Non-vested restricted stock awards at December 31, 2022 and changes during the year ended December 31, 2022 were as follows:

	Number of Shares	Weighted-Average Grant-Date Fair Value
Non-vested at December 31, 2021	6,882,502	$	3.77
Granted	2,360,605	$	2.57
Vested	(3,561,879)	$	2.86
Canceled or forfeited	(426,771)	$	4.83
Non-vested at December 31, 2022	5,254,457	$	3.94