Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Components of Benefits from Income Taxes

The following table shows the components of the provision for income taxes (in thousands):

	For the year ended December 31,
	2019		2018		2017
Current:
State	$	10	$	11	$	10
Deferred:
U.S. Federal	—		—		(125		)
Provision for (benefit from) income taxes	$	10	$	11	$	(115	)

Schedule of Effective Income Tax Rate Reconciliation

The principal items accounting for the difference between income taxes computed at the U.S. statutory rate and the provision for income taxes reflected in our Consolidated Statements of Operations are as follows:

	For the year ended December 31,
	2019		2018		2017
U.S. statutory rate	21.0	%	21.0	%	34.0	%
State taxes (net of federal tax benefit)	2.0		2.5		2.3
Valuation allowance	(20.7	)	(25.0	)	17.4
Deferred rate change due to changes in tax laws	—		—		(51.7	)
Other	(2.4	)	1.4		(1.0	)
	(0.1	)%	(0.1	)%	1.0	%

Schedule of Deferred Tax Assets

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets are as follows (in thousands): 

	At December 31,
	2019			2018			2017
Accrued expenses and other reserves	$	1,505		$	1,964		$	1,749
Right-of-use-asset	(378		)	—			—
Lease liabilities	461			—			—
Tax credits, deferred R&D, and other	44			65			197
Net operating loss	12,758			10,793			8,610
Valuation allowance	(14,390		)	(12,822		)	(10,556		)
Net deferred tax assets	$	—		$	—		$	—