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Note 8 - Long-term Debt (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
201
7
    
20
16
  
HSBC $10,387,500 Mortgage payable secured by real
                
Property, buildings and improvements at 555 N Research
                
Place, Central Islip, NY payable in monthly principle
                
Installments of $62,777.60 including interest at a rate of 3.9148%, maturing on December 1, 2022
   $
10,387,500
     $
---
  
                 
Mesoscribe Technologies, Inc. $300,000
acquisition related contingent payment
               
                 
    $
300,000
      
---
  
                 
HSBC
$6,000,000 Mortgage payable secured by real 
Property, b
uildings and improvements at 355 South Technology Drive, Central Islip, NY payable in monthly principle installments of $25,000 plus interest. Interest presently accrues at our option, at the variable rate of LIBOR plus 1.75% or HSBC’s prime rate minus 0.50% The loan matures on March 1, 2022.
    
2,965,508
      
3,265,508
  
Total
long-term debt
    
13,653,008
      
3,265,508
  
Less: Current maturities
    
747,325
      
300,000
  
Long-term debt
   $
12,905,683
     $
2,965,508
  
Schedule of Maturities of Long-term Debt [Table Text Block]
2018
   $
747,324
  
2019
    
861,364
  
2020
    
674,893
  
2021
    
691,125
  
2022
    
10,678,302
  
Thereafter
    
--
  
Total long-term debt
   $
13,653,008