Convertible Preferred Stock and Stockholders' Equity (Tables)

6 Months Ended

Jun. 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 six month period ended June 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		982,000			$2.03	$	2.03
Exercised		(15,330	)		$0.74 - $0.83	$	0.74
Forfeited		(64,760	)		$0.74 - $43.90	$	9.59
Outstanding, June 30, 2019		2,066,996			$0.74 - $36.20	$	2.09

Summary of Restricted Stock Unit Activity

A summary of the restricted stock unit activity for the six month period ended June 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		210,000		$	1.19
Vested		(174,462	)	$	1.12
Forfeited		(2,750	)	$	0.74
Outstanding, June 30, 2019		680,437		$	0.87