Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Components of Pretax Loss from Operations

The components of the pretax loss from operations for the years ended December 31, 2015, 2014, and 2013 are as follows (in thousands):

Components of the Pretax Loss From Operations (in thousands)
	12/31/2015			12/31/2014			12/31/2013
U.S. Domestic	$	(44,415	)	$	(30,933	)	$	(15,282	)
Foreign	(1,083		)	—			—
Pretax loss from operations	$	(45,498	)	$	(30,933	)	$	(15,282	)

Schedule of Components of Income Tax Expense (Benefit)

Deferred Income Tax Components

Significant components of the Company’s net deferred income taxes for the years ending December 31, 2015 and 2014, are as are as follows:

Deferred Income Tax Components
(in thousands)
	12/31/2015			12/31/2014
Deferred tax assets:
Net operating loss carryforward	$	28,584		$	15,492
Property & equipment	339			77
Inventory	864			620
Stock options	5,208			3,644
Intangible assets, definite-lived	333			421
General business credit	1,915			885
Deferred revenue	372			380
Other	187			—
Charitable contribution	18			13
Valuation allowance	(37,820		)	(21,532		)
Deferred tax assets	$	—		$	—

Effective Tax Rate

The difference between the U.S. federal statutory income tax rate and the Company’s effective tax rate for years ending December 31, 2015, 2014, and 2013 is as follows:

Effective Tax Rate
	12/31/2015		12/31/2014		12/31/2013
U.S. federal statutory income tax rate	(34.00	)%	(34.00	)%	(34.00	)%
State taxes, net of federal tax benefit	(2.93	)	(3.20	)	(3.80	)
Permanent differences	0.11		—		—
Rate differential	0.42		—		—
Unrecognized tax benefits	0.40		—		—
Nondeductible equity and other compensation	2.86		3.70		1.20
Limitation on net operating losses due to §382	—		0.50		1.00
Credit for increased research activities	(2.67	)	(0.80	)	(3.20	)
Change in Valuation allowance	35.81		33.80		38.80
	—	%	—	%	—	%

Uncertain Tax Positions

At December 31, 2015, the Company had uncertain tax positions of $343,000, determined as follows:

Uncertain Tax Positions
(in thousands)
	12/31/2015		12/31/2014		12/31/2013
Balance at beginning of year	$	161	$	—	$	—
Increases for prior positions	—		78		—
Increases for current year positions	182		83		—
Other Increases	—		—		—
Decreases due to settlements	—		—		—
Expiration of the statute of limitations for the assessment of taxes	—		—		—
Other Decreases	—		—		—
Balance at end of year	$	343	$	161	$	—