Stockholders' equity (deficit) (Tables)

9 Months Ended

Sep. 30, 2023

Summary of our Outstanding and Exercisable Warrants and Related Transactions

As of September 30, 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 Outstanding and exercisable
	Warrants			Weighted Average Exercise Price		Aggregate Intrinsic Value			Weighted Average Remaining Contractual Life (in Years)
As of January 1, 2022		536		$	13.10	$	2,427			9.3
Exercised		(435	)		—		(634	)		(4.5	)
Expired		(2	)		—		—			—
As of September 30, 2023		99		$	66.61	$	1,793			6.5

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		(92	)		206.54		—		—		(90	)		206.54		—		—
As of September 30, 2023		80		$	253.31		—		3.2		80		$	253.31		—		3.2

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			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
As of January 1, 2023		57		$	14.57	$	318.63
Granted		163			4.82		—
Vested		(136	)		—		—
Cancelled/Forfeited		—			—		—
Unvested as of September 30, 2023		84		$	8.12	$	253.67

Performance Shares Units [Member]

Schedule of RSUs and PSUs

The following table summarizes the status of our PSUs 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
	PSUs (1)			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
Unvested as of January 1, 2023		19		$	52.15	$	107.55
Granted		—			—		—
Vested		(5	)		—		—
Cancelled/Forfeited		—			—		—
Unvested, as of September 30, 2023		14		$	50.87	$	43.71

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