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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Income before Income Tax, Domestic and Foreign

The provision for (benefit from) income taxes attributable to continuing operations is based upon loss from operations before provision for income taxes as follows (in thousands):



	Year ended December 31,
	2017			2016
Domestic	$	(5,106	)	$	(4,632	)
Foreign	455			711
	$	(4,651	)	$	(3,921	)

Schedule of Components of Income Tax Expense (Benefit)

The provision for (benefit from) income taxes consists of the following (in thousands):



	Year ended December 31,
	2017			2016
Federal:
Current	$	(82	)	$	—
Deferred	—			—
Total federal benefit	(82		)	—
State:
Current	1			18
Deferred	—			—
Total state provision	1			18
Foreign:
Current	53			164
Deferred	—			—
Total foreign provision	53			164
Total income tax expense (benefit)	$	(28	)	$	182

Schedule of Effective Income Tax Rate Reconciliation

The provision for (benefit from) income taxes differs from the amount estimated by applying the statutory Federal income tax rate to loss before taxes as follows (in thousands):



	Year ended December 31,
	2017			2016
U.S. Federal tax benefit at statutory rate	$	(1,629	)	$	(1,372	)
State tax benefit, net of federal benefit	(187		)	(171		)
U.S.-Foreign rate differential	(113		)	(96		)
Change in valuation allowance	(33,001		)	939
Rate differential impact - Tax Cuts and Jobs Act	34,679			—
Research and development credits	281			233
Permanent items	30			657
Others	(88		)	(8		)
Total income tax expense (benefit)	$	(28	)	$	182

Schedule of Deferred Tax Assets and Liabilities

The components of the net deferred income tax asset are as follows (in thousands):



		Year ended December 31,
		2017			2016
Deferred tax assets:
	Net operating loss carry forwards	$	62,635		$	100,378
	Tax credit carry forwards	17,078			19,248
	Fixed and intangible assets	266			597
	Capitalized research and development costs	70			58
	Stock based compensation and other reserves and allowances	2,131			3,445
	Gross deferred income tax assets	82,180			123,726
	Valuation allowance	(82,180		)	(123,726		)
	Net deferred income tax assets	$	—		$	—

Summary of Income Tax Contingencies

The following is a rollforward of the Company's unrecognized tax benefits related to uncertain tax positions for the years ended December 31, 2017 and 2016 (in thousands):



	Year ended December 31,
	2017			2016
Balance as of the beginning of the year	$	9,216		$	9,066
Tax positions related to current year:
Additions	165			152
Reductions	(9		)	(14		)
Tax positions related to prior years:
Additions	26			80
Reductions	(6		)	(4		)
Settlements	—			—
Lapses in statute of limitations	(48		)	(64		)
Balance as of the end of the year	$	9,344		$	9,216