Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

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 three months ended March 31, 2021 (in thousands, except exercise price):

				Options outstanding
						Weighted
	Shares					Average
	Available			Number of		Exercise
	for Grant			Shares		Prices
Balance as of January 1, 2021		81			159	$	10.82
RSUs granted		(10	)		—		—
Balance as of March 31, 2021		71			159	$	10.82

Summary of RSU 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 January 1, 2021		65		$	3.48
Granted		10		$	3.25
Vested		(17	)	$	3.78
Non-vested shares as of March 31, 2021		58		$	3.35

Summary of Significant Ranges of Outstanding and Exercisable Options

The following table summarizes significant ranges of outstanding and exercisable options as of March 31, 2021 (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		143		8.01	$	2.62		79	$	2.88	$	185
$15.00 - $25.59		8		2.49	$	15.00		8	$	15.00	$	—
$25.60 - $143.99		2		3.11	$	41.81		2	$	41.81	$	—
$144.00 - $409.99		5		5.40	$	144.00		5	$	144.00	$	—
$410.00 - $924.00		1		3.94	$	430.64		1	$	430.64	$	—
$1.57 - $924.00		159		8.04	$	10.82		95	$	16.55	$	185