Stockholders' equity (deficit) (Tables)

3 Months Ended

Mar. 31, 2023

Summary of our Outstanding and Exercisable Warrants and Related Transactions

As of March 31, 2023, the following table summarizes the status of our outstanding and exercisable warrants and related transactions since December 31, 2022 (in thousands, except weighted average exercise price and weighted average remaining contractual life data):

	Warrants			Weighted Average Exercise Price		Aggregate Intrinsic Value		Weighted Average Remaining Contractual Life (in Years)
As of January 1, 2023		536		$	13.10	$	2,427		9.3
Exercised		(310	)
Expired		(2	)
As of March 31, 2023		225		$	31.26	$	467		8.5

Summary of Stock Option Activity

The following table summarizes the status of our outstanding and exercisable options and related transactions (each adjusted to account for the Reverse Stock Split) since December 31, 2022 (in thousands, except weighed average exercise price and weighted average remaining contractual life data):

	Outstanding									Exercisable
	Options Awards			Weighted Average Exercise Price		Aggregate Intrinsic Value		Weighted Average Remaining Contractual Life (in Years)		Options Awards			Weighted Average Exercise Price		Aggregate Intrinsic Value		Weighted Average Remaining Contractual Life (in Years)
As of January 1, 2023		172		$	228.28		—		3.6		170		$	229.43		—		3.6
Granted		—			—		—				—			—		—
Exercised		—			—		—				—			—		—
Cancelled/Forfeited		—			—						—			—
Expired		(69	)		219.07						(69	)		219.07
As of March 31, 2023		103		$	234.32		—		2.7		101		$	236.66		—		2.7

Restricted Stock Units [Member]

Schedule of RSUs and PSUs

The following table summarizes the status of our RSUs and related transactions (each adjusted to account for the Reverse Stock Split) since December 31, 2022 (in thousands, except weighed average grant date fair value):

	RSUs awards outstanding								RSUs awards vested and not settled
	RSUs			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value			RSUs			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
As of January 1, 2023		246		$	29.64	$	1,376			189		$	26.28	$	1,059
Granted		120			5.12					50			5.12
Vested and settled		(189	)		26.28		(1,559	)		(189	)		26.28		(1,559	)
Cancelled/Forfeited		—			—					—			—
As of March 31, 2023		177		$	8.15	$	663			53		$	6.85	$	199

Performance Shares Units [Member]

Schedule of RSUs and PSUs

The following table summarizes the status of our PSU and related transactions for each for the following years (each adjusted to account for the Reverse Stock Split) since December 31, 2022 (in thousands, except weighed average grant date fair value):

	Outstanding							Vested and not settled
	PSUs			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value		PSUs			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
As of January 1, 2023		100		$	42.30	$	558		81		$	39.95	$	450
Granted		—			—				—			—		`
Vested and settled		(81	)		39.95		450		(81	)		39.95		450
Cancelled/Forfeited		—			—				—			—
As of March 31, 2023		19	(1)	$	52.15	$	72		5		$	56.05	$	19

(1) The number of PSUs represents the base number of PSUs that will vest.