Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Equity [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):

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Equity Classified Awards
Cost of production	$	(6)	$	198	$	12	$	391
General and administrative		3,318		3,588		7,241		7,082
Other		631		434		1,367		791
Total equity classified awards		3,943		4,220		8,620		8,264
Liability Classified Awards
General and administrative		—		(407)		—		(193)
Other		—		(126)		—		(126)
Total liability classified awards		—		(533)		—		(319)
Total stock-based compensation	$	3,943	$	3,687	$	8,620	$	7,945

Schedule Stock Option Award Activity

Stock option activity under the Company’s stock incentive plans and changes during the six months ended June 30, 2023, 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, 2022	5,945,321	$	4.65		9.1	$	—
Granted	55,918	$	2.12			$	—
Canceled or forfeited	(117,278)	$	4.62			$	—
Exercised	—	$	—			$	—
Options outstanding at June 30, 2023	5,883,961	$	4.63		8.7	$	—
Options vested and expected to vest at June 30, 2023	1,496,017	$	5.25		7.9	$	—

(1) The exercise price of options outstanding range from $2.12 to $11,160 as of June 30, 2023. 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

Non-vested restricted stock awards and the changes during the six months ended June 30, 2023, were as follows:

		Weighted-
		Average
	Number of	Grant-Date
	Shares	Fair Value
Outstanding at December 31, 2022	5,254,457	$	3.94
Granted	593,369	$	1.28
Vested and issued	(155,180)	$	5.45
Canceled or forfeited	(125,062)	$	3.74
Non-vested at June 30, 2023	5,567,584	$	3.63