Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Components of Tax Provision (Benefit) Allocated to Continuing Operations

Components of tax provision (benefit) allocated to continuing operations include the following:

	Year Ended			Year Ended			Year Ended
	December 31,			December 31,			December 31,
	2016			2015			2014
Current:
Federal	$	—		$	(2	)	$	(3,378	)
State		(11	)		49			1
Foreign		21			19			5
Sub-total	$	10		$	66		$	(3,372	)
Deferred:
Federal	$	—		$	—		$	3,516
State		—			—			508
Foreign		—			—			—
Sub-total	$	—		$	—		$	4,024
Total tax provision (benefit)	$	10		$	66		$	652

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

The reconciliation of the statutory federal income tax rate to the Company’s effective income tax rate is as follows:

	Year Ended						Year Ended						Year Ended
	December 31,						December 31,						December 31,
	2016			%			2015			%			2014			%
Income taxes computed at statutory rates	$	(7,369	)		34	%	$	(6,081	)		34	%	$	(5,159	)		34	%
Increases (decreases) resulting from:
State income taxes, net of federal tax benefit		(1,219	)		6	%		(1,298	)		7	%		(700	)		5	%
Impact of federal graduated rates		-			0	%		(4	)		0	%		—			—
Federal and state research    and experimentation credits		(1,112	)		5	%		(917	)		5	%		(563	)		4	%
Change in valuation allowance		9,468			(44	)%		8,132			(45	)%		6,916			(46	)%
Other		242			(1	)%		234			(1	)%		158			(1	)%
Total	$	10			0	%	$	66			0	%	$	652			(4	)%

Components of Deferred Tax Assets and Deferred Tax Liabilities

The tax effects of significant items comprising the Company’s deferred tax assets and deferred tax liabilities are as follows:

	Year Ended			Year Ended
	December 31,			December 31,
	2016			2015
Deferred tax assets:
Stock based compensation	$	1,524		$	1,751
Federal and state net operating losses		21,089			12,551
Goodwill		715			826
Accrued compensation		19			51
Deferred rent		344			62
Federal and state research and experimentation    credit		3,434			2,322
AMT credit		92			92
Intangible asset differences		253			167
Other		39			74
Total gross deferred tax assets		27,509			17,896
Less valuation allowance		(24,888	)		(15,420	)
Net deferred tax assets	$	2,621		$	2,476
Deferred tax liabilities:
Patent expenditures	$	(2,012	)	$	(2,017	)
Fixed asset differences		(609	)		(459	)
Total gross deferred tax liabilities	$	(2,621	)	$	(2,476	)
Total net deferred tax assets	$	—		$	—

Summary of Reconciliation of Uncertain Tax Positions

A summary reconciliation of the Company’s uncertain tax positions is as follows:

	Year Ended			Year Ended		Year Ended
	December 31,			December 31,		December 31,
	2016			2015		2014
Beginning balance	$	425		$	306	$	219
Addition for current year tax positions		100			74		58
Addition for prior year tax positions		2			45		29
Reduction for prior year positions resolved during the current year		(41	)		—		—
Ending balance	$	486		$	425	$	306