Convertible Preferred Stock and Stockholder's Equity (Tables)

9 Months Ended

Sep. 30, 2018

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, 2018 is as follows:

	Number of Options/SARs			Range of Exercise Price	Weighted Average Exercise Price per Share
Outstanding, December 31, 2017		413,301		$0.62 - $54.90	$	9.04
Granted		902,500		$0.74 - $0.83	$	0.75
Exercised		(2,916	)	$0.62	$	0.62
Forfeited		(158,560	)	$0.62 - $54.90	$	7.41
Outstanding, September 30, 2018		1,154,325		$0.62 - $43.90	$	2.80

Summary of Restricted Stock Unit Activity

A summary of the restricted stock unit activity for the nine month period ended September 30, 2018 is as follows:

	Number of Restricted Stock Units			Weighted Average Grant Date Fair  Value per Unit
Outstanding, December 31, 2017		680,363		$	1.11
Granted		422,167		$	0.80
Vested		(382,356	)	$	1.24
Forfeited		(66,775	)	$	1.12
Outstanding, September 30, 2018		653,399		$	0.84