Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Net loss by Jurisdiction

Net loss by jurisdiction consists of the following:

	For the Years Ended December 31,
	2017		2016
	(in thousands)
Domestic	$	28,281	$	41,821
Foreign		1,216		1,033
Total	$	29,497	$	42,854

Schedule of Reconciliation Between Effective Tax Rates and Statutory Rates

A reconciliation between the effective tax rates and statutory rates for the years ended December 31, 2017 and 2016 is as follows:

	For the Years Ended December 31,
	2017				2016
Computed at statutory rate		34.00		%		34.00		%
State income taxes		4.34				4.76
Tax credits		1.76				3.38
Other		(6.04	)			(1.74	)
Federal rate change		(79.56	)			—
Valuation allowance		45.50				(40.40	)
		—		%		—		%

Schedule of Tax Effect of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities

The tax effect of significant temporary differences representing deferred tax assets and liabilities as of December 31, 2017 and 2016 is as follows:

	December 31,
	2017			2016
	(in thousands)
Net operating loss (“NOL”) and credit carryforwards	$	37,252		$	43,765
Capitalized research and development costs		16,115			22,775
Other		1,722			1,963
Valuation allowance		(55,089	)		(68,503	)
	$	—		$	—

Schedule of Change in Unrecognized Tax Benefits

The change in unrecognized tax benefits for each of the years ended December 31, 2017 and 2016 is as follows:

	For the Years Ended December 31,
	2017			2016
	(in thousands)
Balance at January 1,	$	488		$	333
Additions for prior year tax positions		(4	)		6
Additions for current year tax positions		51			149
	$	535		$	488