Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

Stock option activity, including options granted under the 2018 Plan, the Prior Plan, and the Non-Plan Grants, was as follows:

	2019							2018
	Shares			Weighted Average Exercise Price Per Share		Weighted Average Fair Value at Grant Date Per Share		Shares			Weighted Average Exercise Price Per Share		Weighted Average Fair Value at Grant Date Per Share
Outstanding at January 1		496,958		$	9.90	$	6.62		67,465		$	71.03	$	36.85
Granted		100,000		$	2.24	$	1.95		—			—		—
Cancelled or expired		(395,000	)	$	4.71	$	3.69		(131	)	$	88.82	$	55.76
Outstanding at March 31		201,958		$	10.62	$	6.74		67,334		$	74.70	$	36.74
Exercisable at March 31		71,249		$	24.35	$	14.09		67,334		$	74.70	$	36.74

Schedule of Assumptions of Stock Option Granted

The estimated fair value of stock options granted is done using the Black-Scholes-Merton method applied to individual grants. Key assumptions used to estimate the fair value of stock awards are as follows:

	Three Months Ended
	March 31,
	2019			2018
Risk free interest rate		2.7	%		—
Dividend yield		0	%		—
Expected term		10.0 years			—
Expected volatility		91	%		—
Expected forfeiture rate		30	%		—