Convertible Preferred Stock and Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2019

Stockholders' Equity Note [Abstract]

Summary of Option and Stock Appreciation Rights Activity

A summary of the option and stock appreciation rights activity for the nine month period ended September 30, 2019 is as follows:

	Number of Options/SARs			Range of Exercise Price	Weighted Average Exercise Price per Share
Outstanding, December 31, 2018		1,165,086		$0.74 - $43.90	$	2.54
Granted		992,000		$2.03 - $2.89	$	2.04
Exercised		(35,328	)	$0.74 - $2.15	$	0.90
Forfeited		(177,502	)	$0.74 - $43.90	$	4.50
Outstanding, September 30, 2019		1,944,256		$0.74 - $36.20	$	2.13

Summary of Restricted Stock Unit Activity

A summary of the restricted stock unit activity for the nine month period ended September 30, 2019 is as follows:

	Number of Restricted Stock Units			Weighted Average Grant Date Fair Value per Unit
Outstanding, December 31, 2018		647,649		$	0.83
Granted		420,000		$	1.98
Vested		(206,962	)	$	1.36
Forfeited		(16,600	)	$	0.76
Outstanding, September 30, 2019		844,087		$	1.28