Note 5 - Prepaid Expenses and Other Current Assets (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Prepaid Expenses and Other Current Assets [Table Text Block]
 
 
December 31,
 
 
 
2016
 
 
2015
 
                 
Prepaid service invoices
   $
65
    $
48
 
Prepaid manufacturing and mold costs
    
27
     
118
 
Prepaid insurance premiums
    
220
     
192
 
Other receivables
    
-
     
50
 
Total
    
312
     
408