Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of patents

Patents as of December 31, 2016 and 2015 are as follows:

	As of December 31,
	2016			2015
	(in thousands)
Patents	$	18,052		$	18,052
Less: accumulated amortization	(18,052		)	(18,052		)
Total	$	—		$	—

Summary of antidilutive securities

Potentially dilutive common shares from employee equity plans and warrants are determined by applying the treasury stock method to the assumed exercise of warrants and share options and were excluded from the computation of diluted net loss per share because their inclusion would be anti-dilutive and consist of the following:

	December 31,
	2016	2015
Stock options	1,607,346	1,510,832
Restricted stock units	185,260	408,710
Total	1,792,606	1,919,542