Annual report pursuant to Section 13 and 15(d)

Income Taxes (Tables)

v3.19.1
Income Taxes (Tables)
12 Months Ended
Dec. 31, 2018
Income Tax Disclosure [Abstract]  
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
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 and operating loss and credit carryforwards. Significant components of our deferred tax assets are as follows (in thousands):
 
 
 
December 31,
 
 
 
2018
 
 
2017
 
Deferred tax assets:
 
 
 
 
 
 
 
 
Net operating loss carryforwards
 
$
62,863
 
 
$
62,295
 
Research credit carryforwards
 
 
15,886
 
 
 
15,873
 
Other, net
 
 
1,321
 
 
 
1,705
 
Total deferred tax assets
 
 
80,070
 
 
 
79,873
 
Valuation allowance
 
 
(80,070
)
 
 
(79,873
)
Net deferred tax assets
 
$
 
 
$
 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
The provision for income taxes consists of state minimum taxes due. The effective tax rate of our provision (benefit) for income taxes differs from the federal statutory rate as follows (in thousands):
 
 
 
Year Ending December 31,
 
 
 
2018
 
 
2017
 
 
2016
 
Computed at 21%
 
$
(1,879
)
 
$
(4,832
)
 
$
1,758
 
State taxes
 
 
(167
)
 
 
(157
)
 
 
(187
)
Change in valuation allowance
 
 
197
 
 
 
(28,555
)
 
 
(4,439
)
Other
 
 
121
 
 
 
388
 
 
 
659
 
Revaluation of warrant liability
 
 
(30
)
 
 
(210
)
 
 
(280
)
Research and development credits
 
 
144
 
 
 
(250
)
 
 
(252
)
Net operating loss carryforward expirations
 
 
975
 
 
 
1,007
 
 
 
2,741
 
Impact of 2017 Tax Act
 
 
 
 
 
32,609
 
 
 
 
Impact of IRC 162m
 
 
639
 
 
 
 
 
 
 
Total
 
$
 
 
$
 
 
$