XML 39 R26.htm IDEA: XBRL DOCUMENT v3.19.1
Note 5 - Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
Estimated
useful lives
 
As of December 31,
  
   
in years
  
201
8
    
201
7
  
Office furniture and equipment
    
3
to 
10 
   $
5,041
     $
4,904
  
Leasehold improvements
    
1
to
6 
    
1,570
      
1,509
  
Vehicles
    
5
to 
10 
    
206
      
160
  
Manufacturing and test equipment
    
2
to 
10 
    
2,633
      
2,577
  
     
 
 
 
    
9,450
      
9,150
  
Accumulated depreciation and amortization
    
 
 
 
    
(8,062
)
    
(7,601
)
Property and equipment, net
    
 
 
 
   $
1,388
     $
1,549