April 2013 Pillar Agreements (Tables)

12 Months Ended

Dec. 31, 2016

April 2013 Pillar Agreements

Schedule of assumptions and other inputs used to compute fair value of agreement warrants

	Pillar I Warrants			Additional Pillar Warrants
Common stock price	$	0.57		$	0.57
Warrant exercise price	$	0.61		$	0.79
Term of warrant (years)		5.0			1.1
Expected volatility		62	%		67	%
Average risk free interest rate		0.8	%		0.1	%
Expected dividend yield		—			—
Expected percentage of warrants to be exercised		100	%		100	%