Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Share Available for Grant Under the 2019 Plan

The following table summarizes the activity in the shares available for grant under the Plans during the nine months ended September 30, 2022 (in thousands, except exercise price):

				Options Outstanding
							Weighted
	Shares						Average
	Available			Number of			Exercise
	for Grant			Shares			Prices
Balance as of December 31, 2021		3,024			1,558		$	3.49
Options cancelled		—			(13	)	$	10.98
Balance as of March 31, 2022		3,024			1,545		$	3.43
RSUs granted		(1,511	)		—		$	-
RSUs cancelled and returned to the Plan		43			—		$	-
Options cancelled		—			(8	)	$	2.63
Balance as of June 30, 2022		1,556			1,537		$	3.43
RSUs granted		(67	)		—		$	-
RSUs cancelled and returned to the Plan		103			—		$	-
Options cancelled		—			(23	)	$	2.57
Balance as of September 30, 2022		1,592			1,514		$	3.39

Summary of RSU's Activity Under Plans

A summary of RSU activity under the Plans is presented below (in thousands, except for fair value):

				Weighted
				Average
	Number of			Grant-Date
	Shares			Fair Value
Non-vested shares as of December 31, 2021		88		$	4.84
Vested		(13	)	$	3.70
Non-vested shares as of March 31, 2022		75		$	5.67
Granted		1,511			—
Vested		(271	)	$	2.49
Cancelled		(12	)		—
Non-vested shares as of June 30, 2022		1,303		$	2.28
Granted		67			—
Vested		(38	)	$	2.45
Cancelled		(103	)		—
Non-vested shares as of September 30, 2022		1,229		$	2.27

Summary of Significant Ranges of Outstanding and Exercisable Options

The following table summarizes significant ranges of outstanding and exercisable options as of September 30, 2022 (in thousands, except contractual life and exercise price):

	Options Outstanding						Options Exercisable
			Weighted
			Average
			Remaining		Weighted				Weighted
			Contractual		Average				Average		Aggregate
	Number		Life		Exercise		Number		Exercise		Intrinsic
Range of Exercise Price	Outstanding		(in Years)		Price		Exercisable		Price		value
$1.57 - $14.99		1,502		7.89	$	2.65		865	$	2.52	$	10
$15.00 - $25.59		5		0.98	$	17.12		5	$	17.12	$	—
$25.60 - $143.99		1		3.89	$	101.27		1	$	101.27	$	—
$144.00 - $409.99		5		3.74	$	144.00		5	$	144.00	$	—
$410.00 - $924.00		1		1.95	$	410.00		1	$	410.00	$	—
$1.57 - $924.00		1,514		7.85	$	3.39		877	$	3.81	$	10