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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Allocated Stock-based Compensation Expense

The following table summarizes the components of stock-based compensation expense in the consolidated statements of operations for the three and nine months ended September 30, 2020 and 2019, respectively (in thousands):

			Three Months Ended September 30,												Nine Months Ended September 30,
			2020						2019						2020						2019
Research and development			$	5					$	(1)					$	10					$	(4)
General and administrative			141						116						427						430
Total stock-based compensation			$	146					$	115					$	437					$	426

Assumptions for Option Grants Issued

The Company uses the Black-Scholes option-pricing model to determine the fair value of all its stock options granted. The assumptions used during the nine months ended September 30, 2020 and 2019, respectively, were as follows:

									Nine Months Ended September 30,
															2020						2019
Risk free interest rate															0.62		%				2.49		%
Volatility															106.24		%				96.57		%
Expected lives (years)															6.15						6.20
Expected dividend yield															—		%				—		%

Summary of Stock Option Activity

The following table summarizes stock option activity of the Company for the nine months ended September 30, 2020:

			Total Number of Shares						Weighted Average Exercise Price						Weighted Average Remaining Contractual Term (in years)						Aggregate Intrinsic Value (In Thousands)
Outstanding at December 31, 2019			21,520						$	112.81					8.98						$	—
Granted			186,000						1.87												$	—
Outstanding at September 30, 2020			207,520						$	13.38					9.33						$	145
Options exercisable at September 30, 2020			10,892						$	129.19					8.16						$	—

Summary of RSU Activity

The following table summarizes RSU activity of the Company for the nine months ended September 30, 2020:

			Shares						Weighted Average Grant Date Fair Value
Unvested at December 31, 2019			—						$	—
Granted			170,000						$	1.89
Vested			—						$	—
Unvested at September 30, 2020			170,000						$	1.89

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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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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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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