Note M - Income Taxes
12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Income Tax Disclosure [Text Block]
M.
Income Taxes
 
The Company
’s financial statements include a total state tax benefit of
$15,000,
$15,000
and
$22,000
on a loss before income taxes of
$16.5
million,
$54.6
million and
$24.5
million for the years ended
December
31,
2016,
2015
and
2014,
respectively. A reconciliation of the difference between the benefit for income taxes and income taxes at the statutory U.S. federal income tax rate is as follows (in thousands):
 
   
Year ended December 31,
 
   
2016
   
2015
   
2014
 
Federal statutory rate
   
34.00
%
   
34.00
%
   
34.00
%
Effect of:
                       
Change in valuation allowance
   
(69.31
)
   
(19.25
)
   
(32.88
)
Return to provision and deferred true-up    
(23.83
)    
     
0.36
 
Change in rate    
(14.63
)    
     
 
State tax benefit (net of federal)
   
15.64
     
4.06
     
5.96
 
Warrant liability
   
68.44
 
   
(15.28
)
   
(9.39
State research and development credit
   
0.09
     
0.03
     
0.09
 
Federal research and development credit
   
5.65
     
0.84
     
3.29
 
Amortization    
(3.15
)    
     
 
Conversion feature and put option on 2013 convertible
notes
   
 
   
(1.68
)
   
(1.26
)
Interest expense
   
     
     
0.21
 
Stock-based compensation
   
(12.71
)
   
(1.28
   
 
Other
   
(0.10
)
   
(1.42
   
(0.29
)
Federal income tax provision effective rate
   
0.09
%
   
0.02
%
   
0.09
%
 
The components of deferred tax assets and liabilities are as follows (in thousands):
 
   
December 31,
   
December 31,
   
December 31,
 
   
2016
   
2015
   
2014
 
Deferred tax assets relating to:
                       
Net operating loss carryforwards
  $
44,984
    $
26,617
    $
16,390
 
Research and development tax carryforward
   
3,166
     
2,254
     
1,793
 
Compensation
   
715
     
232
     
83
 
Total gross deferred tax assets
   
48,865
     
29,103
     
18,266
 
Deferred tax liabilities relating to:
                       
Property and equipment
   
89
     
80
     
170
 
Total gross
deferred tax liabilities
   
89
     
80
     
170
 
Deferred tax assets less liabilities
   
48,776
     
29,023
     
18,096
 
Valuation allowance
   
(48,776
)
   
(29,023
)
   
(18,096
)
Net deferred tax asset (liability)
  $
    $
    $
 
 
In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax
assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. Based upon the level of historical taxable income and projections for future taxable income over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that the Company will not realize the benefits of these deductible differences in the future.
 
The Company had the following federal net operating loss carryforward and research activities credits as of
December
31,
2016
(in thousands):
 
   
Net Operating
   
Research
   
 
 
 
Year Incurred
 
Loss Carryforwards
   
Activities Credit
   
Expiration
 
2007
  $
454
    $
30
     
2027
 
2008
   
1,178
     
65
     
2028
 
2009
   
3,060
     
176
     
2029
 
2010
   
3,423
     
149
     
2030
 
2011
   
9,929
     
176
     
2031
 
2012
   
     
170
     
2032
 
2013
   
4,353
     
133
     
2033
 
2014
   
15,819
     
894
     
2034
 
2015
   
24,189
     
461
     
2035
 
2016    
 40,959
     
 912
     
 2036
 
    $
103,364
    $
3,166
     
 
 
 
The Company also has certain state net operating loss carryforwards totaling
$108.6
million that expire between
2027
and
2036.
Due to potential ownership changes that
may
have occurred or would occur in the future, IRC Section
382
may
place additional l
imitations on the Company’s ability to utilize the net operating loss carryforward.
 
Financial Interpretation No.
48
(“
FIN
48”),
Accounting for Uncertainty in Income Taxes
, uses the term “more likely than not” to evaluate whether or not a tax position will be sustained upon examination. The Company has not identified any tax positions that do not meet the more likely than not threshold.