Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Taxes [Abstract]

Components of Loss before Income Taxes

The components of our loss before income taxes are as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
United States	$	(16,463	)	$	(25,754	)	$	(3,412	)
Foreign		530			(2,280	)		556
Total		(15,933	)		(28,034	)		(2,856	)
Income from discontinued operations, before income taxes		—			—			—
Loss from continuing operations, before income taxes	$	(15,933	)	$	(28,034	)	$	(2,856	)

Components of Provision (Benefit) for Income Taxes from Continuing Operations

The provision (benefit) for income taxes from continuing operations consisted of the following (in thousands):

	Year Ended December 31,
Current:	2016		2015			2014
Federal	$	—	$	—		$	—
State		3		23			34
Foreign		287		179			380
Total Current		290		202			414
Deferred
Federal		—		(1,119	)		265
State		—		(84	)		19
Foreign		17		36			42
Total Deferred		17		(1,167	)		326
Provision (benefit) for income taxes	$	307	$	(965	)	$	740

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

The reconciliation of the Federal statutory income tax rate to our effective income tax rate is as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Provision at Federal statutory rate	$	(5,517	)	$	(9,812	)	$	(1,000	)
State taxes		3			(60	)		53
Permanent differences/other		156			1,370			633
Stock-based compensation		1,157			762			2,311
Federal valuation allowance (used) provided		4,508			6,775			(1,257	)
Provision (benefit) for income taxes	$	307		$	(965	)	$	740

Components of Deferred Tax Assets and Liabilities

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes.   Significant components of our deferred tax assets and liabilities are as follows (in thousands):

	December 31,
	2016			2015
Deferred Tax Assets
Fixed assets	$	133		$	163
Deferred revenue		39			28
Accruals and reserves		324			428
Stock options		945			1,706
Net operating loss carryforwards		48,852			44,863
Federal and state credits		3,320			3,323
Foreign credits		156			152
Intangible assets		4,167			4,259
Research and development expense		4,347			2,539
Gross deferred tax assets		62,283			57,461
Valuation allowance		(62,079	)		(57,245	)
Total deferred tax assets		204			216
Deferred Tax Liabilities		—			—
Net deferred tax asset/liabilities	$	204		$	216

Reconciliation of Beginning and Ending Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):

	Year Ended December 31,
	2016			2015
Balance at beginning of year	$	2,368		$	2,460
Increase related to prior year tax positions		8			—
Decrease related to prior year tax positions		(4	)		(78	)
Increase related to current year tax positions		82			12
Decrease related to lapse of statute of limitations		(169	)		(26	)
Balance at end of year	$	2,285		$	2,368