Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Assumptions used in Estimation of Fair Value of the Share-based Payment Awards on the Grant Date

	Nine Months Ended
	September 30, 2019
Risk-free interest rate		2.5	%
Volatility		128.4	%
Expected life (years)	3.0 - 5.0
Dividend yield		—	%

Summary of Share Available for Grant Under the 2019 Plan

The following table summarizes the activity in the shares available for grant under the 2019 Plan during the nine months ended September 30, 2020 (in thousands, except exercise price):

				Options outstanding
							Weighted
	Shares						Average
	Available			Number of			Exercise
	for Grant			Shares			Prices
Balance as of January 1, 2020		88			161		$	10.85
RSUs granted		(3	)		—			—
Options cancelled		—			(1	)	$	4.00
Balance as of September 30, 2020		85			160		$	10.90

Summary of RSU Activity under the 2019 and 2010 Plan

A summary of RSU activity under the 2019 Plan and the 2010 Plan 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, 2020		103		$	3.75
Vested		(21	)	$	3.80
Non-vested shares as of March 31, 2020		82		$	3.74
Cancelled		(1	)	$	4.55
Non-vested shares as of June 30, 2020		81		$	3.73
Granted		3		$	1.87
Vested		(20	)	$	3.56
Cancelled		(4	)	$	4.00
Non-vested shares as of September 30, 2020		60		$	3.58

Summary of Significant Ranges of Outstanding and Exercisable Options

The following table summarizes significant ranges of outstanding and exercisable options as of September 30, 2020 (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		8.51	$	2.63		54	$	2.99	$	—
$15.00 - $25.59		8		2.99	$	15.00		8	$	15.00	$	—
$25.60 - $143.99		3		3.61	$	41.88		3	$	41.83	$	—
$144.00 - $409.99		5		5.90	$	144.00		5	$	144.00	$	—
$410.00 - $924.00		1		4.44	$	430.64		1	$	430.64	$	—
$1.57 - $924.00		160		8.04	$	11.02		71	$	21.59	$	—