Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Reconciliation of Federal Statutory Income Tax Rate and Effective Income Tax Rate

A reconciliation of the federal statutory income tax rate and the effective income tax rate is as follows for the years ended December 31, 2017 and 2016:

	December 31,
	2017			2016
	(%)			(%)
Federal statutory rate		34			34
Warrant liability FMV adjustment		(8	)		6
Stock issuance costs	—				(5	)
Research and development credits		3			3
Removal of net operating loss and other credits		33			(33	)
Impact of federal tax rate change		(65	)	—
Stock compensation and other permanent items		3			(5	)
Effective income tax rate	—			—

Summary of Significant Components of Deferred Tax Assets

Significant components of the Company’s deferred tax assets at December 31, 2017 and 2016 are as follows:

	December 31,
	2017			2016
Acquired technology	$	103,000		$	201,000
Stock compensation expense		490,000			539,000
Accruals and other		216,000			130,000
Total deferred tax assets		809,000			870,000
Less valuation allowance		(809,000	)		(870,000	)
Net deferred tax assets	$	—		$	—

Summary of Changes in Amount of Unrecognized Tax Benefits (Excluding Interest and Penalties)

A summary of the changes in the amount of unrecognized tax benefits (excluding interest and penalties) for 2017 and 2016 are as follows:

	2017		2016
Beginning balance of unrecognized tax benefits	$	1,961,595	—
Additions based on tax positions of prior years	—		$	1,961,595
Ending balance of unrecognized tax benefits	$	1,961,595	$	1,961,595