Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Taxes Tables

Schedule of Tax Effects of Temporary Differences that Give Rise to Significant Portions of Deferred Tax Assets and Liabilities

Deferred tax assets are summarized as follows (in thousands):

		December 31,
		2018		2017
Deferred tax assets
Reserves	$	1,152	$	1,561
Net operating loss carryforwards		83,608		82,210
R&D credit carryforwards		8,593		7,435
Depreciation/amortization deferred		15,884		13,005
Other		6,076		5,944
Net deferred taxes before valuation allowance		115,313		110,155
Less: Valuation allowance		(115,313)		(110,155)
Deferred tax assets	$	-	$	-