Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Stock-Based Compensation [Abstract]

Summary of Stock-Based Compensation Expense

The following table summarizes the stock-based compensation expense which was recognized in the consolidated statements of operations for the years ended December 31,

(Dollars in thousands)	2018		2017
Selling, general and administrative	$	1,958	$	452
Research and development		129		50
Total	$	2,087	$	502

Summary of Plan Stock Option Activity

The following is a summary of the Plans’ stock option activity during the years ended December 31:

	2018					2017
	Options Outstanding			Weighted Average Exercise Price		Options Outstanding			Weighted Average Exercise Price
Beginning Balance		2,562		$	1,049.93		272		$	31,021.57
Granted		163,997			45.76		2,461			167.30
Exercised		—			—		—			—
Forfeited/expired		(26,013	)		61.01		(171	)		36,429.90
Outstanding at December 31		140,546		$	61.25		2,562		$	1,049.93
Vested at December 31		16,206		$	169.07		148		$	11,338.37

Weighted Average Assumptions used in Black-Scholes Option Pricing Model

The following table provides the weighted average assumptions used in the Black-Scholes option pricing model for the years ended December 31:

	2018			2017
Expected dividend yield		0	%		0	%
Risk-free interest rate		2.49	%		1.97	%
Expected volatility		120.54	%		103	%
Expected life (in years)		6.23			6.25

Summary of Restricted Stock Award Activity

The following table summarizes restricted stock award activity during 2018 and 2017:

	2018					2017
	RSUs			Weighted Average Grant Price		RSUs			Weighted Average Grant Price
Nonvested, beginning balance		15		$	7,297.22		33		$	9,052.37
Granted		—			—		11			1,514.80
Vested		(12	)		7,297.22		(29	)		1,854.56
Forfeited		—			—		-			-
Nonvested at December 31		3		$	7,297.22		15		$	7,297.22