Annual report pursuant to Section 13 and 15(d)

Income Taxes (Tables)

v3.6.0.2
Income Taxes (Tables)
12 Months Ended
Dec. 31, 2016
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,
 
 
 
2016
 
2015
 
Deferred tax assets:
 
 
 
 
 
 
 
Net operating loss carryforwards
 
$
87,267
 
$
91,365
 
Research credit carryforwards
 
 
14,322
 
 
13,884
 
Other, net
 
 
2,637
 
 
3,417
 
Deferred revenue
 
 
 
 
 
Total deferred tax assets
 
 
104,226
 
 
108,666
 
Valuation allowance
 
 
(104,226)
 
 
(108,666)
 
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,
 
 
 
2016
 
2015
 
2014
 
Computed at 34%
 
$
1,758
 
$
(3,840)
 
$
(839)
 
State taxes
 
 
(187)
 
 
(268)
 
 
592
 
Book gains (losses) not currently benefited
 
 
(4,439)
 
 
2,740
 
 
454
 
Other
 
 
659
 
 
(20)
 
 
235
 
Revaluation of warrant liability
 
 
(280)
 
 
1,534
 
 
(346)
 
Research and development credits
 
 
(252)
 
 
(146)
 
 
(97)
 
Net operating loss carryforward expirations
 
 
2,741
 
 
 
 
 
Total
 
$
 
$
 
$
(1)