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Note 8 - Income Taxes
 12 Months Ended
Dec. 31, 2015
Notes to Financial Statements  
Income Tax Disclosure [Text Block]
8     INCOME TAXES
 
The provision for (benefit from) income taxes consists of the following:
 
Year ended December 31,
  
2015
    
2014
    
2013
  
Current:
                        
Federal
   $ 82,000     $ (8,646,000 )   $ 3,334,000  
Prior year under accrual     143,000       44,000       190,000  
State
     107,000       6,000       ---  
                         
Deferred:
                        
Federal
     2,659,000       (3,877,000 )     (107,000 )
    $ 2,991,000     $ (12,473,000 )   $ 3,417,000  
 
The difference between the income tax provision computed at the federal statutory rate and the actual tax provision is accounted for as follows:
 
December 31,
  
2015
    
2014
    
2013
  
                         
Taxes computed at the federal
statutory rate
   $ 2,722,000     $ (12,812,000 )   $ 3,792,000  
State income tax, net     70,000       4,000       --  
Prior year true-up     325,000       44,000       190,000  
Research and development tax credit     (177,000 )     (140,000 )     ---  
Reduction in domestic production activity     --       893,000       ---  
AMT credit carryforward
     --       (584,000 )     ---  
Permanent differences
     51,000       122,000       (565,000 )
Provision for (benefit from) income taxes
   $ 2,991,000     $ (12,473,000 )   $ 3,417,000  
 
The components of deferred income tax assets and liabilities are as follows:
 
Deferred Tax Assets:
  
2015
    
2014
  
Revenue recognition
   $ --     $ 560,000  
Interest rate swap
     3,000       5,000  
FIN 48 liability
     33,000       ---  
Allowance for doubtful accounts
     26,000       9,000  
Credit carryforwards
     1,303,000       1,134,000  
Deferred rent
     212,000       197,000  
Stock options
     626,000       827,000  
Charitable contributions carry foward
     18,000       ---  
Net operating loss carryforward
     1,006,000       2,567,000  
Deferred Tax Assets
     3,227,000       5,299,000  
                 
Deferred Tax Liabilities:
                
Prepaid expenses
     156,000       128,000  
Revenue recognition
     606,000       ---  
Property and equipment     575,000       622,000  
Deferred tax liabilities
     1,337,000       750,000  
Net Deferred Tax Assets
   $ 1,890,000     $ 4,549,000  
 
The Company recognized, for income tax purposes, a tax benefit of $33,000, $86,000 and $27,000 for the years ended December 31, 2015, 2014 and 2013, respectively, for compensation expense related to its stock option plan for which no corresponding charge to operations has been recorded. Such amounts have been added to additional paid-in capital in those years.