Note 7 - Accrued Expenses
 12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
7.
    Accrued Expenses
 
Accrued expenses consisted of the following:
 
   
December 31,
  
 
 
2016
 
 
2015
 
Accrued compensation
   $
23,050
    $
20,523
 
NET Services accrued contract payments
    
32,001
     
26,669
 
Income taxes payable
    
372
      
24,200
 
Other
    
45,449
      
46,044
 
Total accrued expenses
   $
100,872
    $
117,436