Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement, Noncash Expense [Abstract]

Schedule of Weighted Average Grant-Date Fair Value of Stock Options

The weighted average grant-date fair value of stock options used in the calculation of stock-based compensation expense in the accompanying statement of operations for the years ended December 31, 2019 and 2018 is calculated using the following assumptions:

	Years Ended December 31,
	2019		2018
Risk-free interest rate	1.9%		2.2 - 3.0%
Expected dividend yield	—		—
Expected option term	10 years		3 - 5 years
Volatility	72.4	%	70.0	%

Summary of Option Activity

A summary of option activity for the year ended December 31, 2019 is presented below:

	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value
Outstanding at December 31, 2018	49,410		$	40.84
Granted	150,000		4.58
Exercised	—		—
Forfeited	(34,420	)	38.69
Expired	(10	)	19,713.00
Outstanding at December 31, 2019	164,980		$	7.16	9.3	$	—
Vested or expected to vest at December 31, 2019	164,980		$	7.16	9.3	$	—
Exercisable at December 31, 2019	13,086		$	34.54	2.0	$	—