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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2019

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				2018
Risk-free interest rate			2.5	%			2.2	%
Volatility			128.4	%			109.5	%
Expected life (years)		3.0 - 5.0					4.0
Dividend yield			—	%			—	%

Summary of option and RSU activity under Amended and Restated 2000 Stock Option and Equity Incentive Plan and Amended and Restated 2010 Equity Incentive Plan

A summary of option and RSU activity under the Company’s Amended and Restated 2010 Equity Incentive Plan (the 2010 Plan) is presented below (in thousands, except exercise price):

						Options outstanding
										Weighted
		Shares								Average
		Available				Number of				Exercise
		for Grant				Shares				Prices
Balance as of January 1, 2019			200				17			$	83.80
Additional shares authorized under the Plan			2				—				—
RSUs granted			(101	)			—				—
RSUs cancelled and returned to the Plan			1				—				—
Options granted			(65	)			65			$	4.00
Balance as of March 31, 2019			37				82			$	20.40
RSUs granted			(6	)			—				—
Options cancelled and returned to the Plan			1				(1	)		$	144.00
Balance as of June 30, 2019			32				81			$	20.00
Plan termination			(32	)			—			$	—
Balance as of September 30, 2019			-				81			$	20.00

Summary of RSU activity under the Plan

A summary of RSU activity under the 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, 2019			14			$	24.60
Granted			101			$	4.00
Vested			(8	)		$	29.60
Cancelled			(1	)		$	25.20
Non-vested shares as of March 31, 2019			106			$	4.60
Granted			6			$	4.60
Vested			(5	)		$	16.20
Non-vested shares as of June 30, 2019			107			$	4.00
Vested			(16	)		$	4.00
Non-vested shares as of September 30, 2019			91			$	4.00

Summary of significant ranges of outstanding and exercisable options

The following table summarizes significant ranges of outstanding and exercisable options as of September 30, 2019 (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
$3.72 - $14.99			64				9.35			$	3.96				11			$	4.00			$	—
$15.00 - $25.59			8				4.05			$	15.00				5			$	15.00			$	—
$25.60 - $143.99			3				4.83			$	41.88				2			$	46.93			$	—
$144.00 - $409.99			5				6.90			$	144.00				5			$	144.00			$	—
$410.00 - $924.00			1				5.44			$	430.64				1			$	430.64			$	—
$3.72 - $924.00			81				8.46			$	20.36				24			$	56.81			$	—

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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